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* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
1. WAP to print addition, subtraction, multiplication and division. import java.io.*; class Pro1 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter value of x: "); String v1 = in.readLine(); int x = Integer.parseInt(v1); //Accepting first value System.out.print("Enter value of y: "); String v2 = in.readLine(); int y = Integer.parseInt(v2); //Accepting second value System.out.println("Addition is " + (x+y)); // Displaying Sum of Numbers System.out.println("Substraction is " + (x-y)); // Displaying Difference of Numbers System.out.println("Multiplication is " + (x*y)); // Displaying Product of Numbers System.out.println("Division is " + (x/y)); // Displaying Division of Numbers } } Output: Enter value of x: 5 Enter value of y: 2 Addition is 7 Substraction is 3 Multiplication is 10 Division is 2 Variable Used : Variables x y Datatypes int int Description Stores first value Stores second value 2. WAP to convert the time entered in minutes to hours and minutes. import java.io.*; class Pro2 { public static void main(String[]args)throws IOException { InputStreamReader r=new InputStreamReader(System.in); BufferedReader in=new BufferedReader(r); System.out.print("Enter Total Minutes : "); String v1=in.readLine(); int minutes=Integer.parseInt(v1); //Accepting time in minutes int hr=minutes/60; // Calculating total hours int min=minutes%60; // Calculating remaining minutes System.out.println("Hour = "+hr+ " Minute= "+min); } } Output: Enter Total Minutes : 125 Hour= 2 Minute= 5 Variable Used : Variables minutes hr min Datatypes int int int Description Accepts total minutes Stores calculated hours Stores calculated minutes 3. WAP to find greatest of two numbers. import java.io.*; class Pro3 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter value of x: "); String v1 = in.readLine(); int x = Integer.parseInt(v1); System.out.print("Enter value of y: "); String v2 = in.readLine(); int y = Integer.parseInt(v2); int max; if(x > y) // checking whether x is greater than y max = x; else max = y; System.out. println("Greater number is " + max); } } Output: Enter value of x: 8 Enter value of y: 5 Greater number is 8 Variable Used : Variables x y max Datatypes int int int Description Stores first value Stores second value Stores maximum value 4. WAP to find greatest of three numbers. import java.io.*; class Pro4 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter value of x: "); String v1 = in.readLine(); int x = Integer.parseInt(v1); System.out.print("Enter value of y: "); String v2 = in.readLine(); int y = Integer.parseInt(v2); System.out.print("Enter value of z: "); String v3 = in.readLine(); int z = Integer.parseInt(v3); int max; if(x > y && x > z) // checking whether x is > than y and z max = x; else if(y > x && y > z) // checking whether y is > than x and z max = y; else max = z; System.out. println("Greatest number is " + max); } } Output: Enter value of x: 10 Enter value of y: 2 Enter value of z: 5 Greatest number is 10 Variable Used : Variables x y z max Datatypes int int int int Description Stores first value Stores second value Stores third value Stores the maximum value 5. WAP to find the smallest of four numbers. import java.io.*; class Pro5 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter value of x: "); String v1 = in.readLine(); int x = Integer.parseInt(v1); System.out.print("Enter value of y: "); String v2 = in.readLine(); int y = Integer.parseInt(v2); System.out.print("Enter value of z: "); String v3 = in.readLine(); int z = Integer.parseInt(v3); System.out.print("Enter value of w: "); String v4 = in.readLine(); int w = Integer.parseInt(v4); int min; if(x < y && x < z && x < w) // checking if x is smaller than y,z and w min = x; else if(y < x && y < z && y < w) //checking if y is smaller than y,z and w min = y; else if(z < x && z < y && z < w) //checking if z is smaller than y,z and w min = z; else min = w; System.out. println("Smallest number is " + min); } } Output: Enter value of x: 12 Enter value of y: 5 Enter value of z: 8 Enter value of w: 2 Smallest number is 2 Variable Used : Variables Datatypes Description x int Stores first value y int Stores second value z int Stores third value w min int int Stores fourth value Stores the maximum value 6. WAP to print even or odd for a number. import java.io.*; class Pro6 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter any number : "); String v1 = in.readLine(); int x = Integer.parseInt(v1); if(x % 2 == 0) // checking divisibility by 2 System.out.println(x + " is Even "); else System.out.println(x + " is Odd "); } } Output: Enter any number : 85 85 is Odd Variable Used : Variables x Datatypes int Description Stores input value 7. WAP to find that a year is leap year or not. import java.io.*; class Pro7 { public static void main(String [] args)throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter any year : "); String v1 = in.readLine(); int yr = Integer.parseInt(v1); if(yr % 4 == 0) //checking divisibility by 4 System.out.println(yr + " is leap year "); else System.out.println(yr + " is not a leap year "); } } Output: Enter any year : 2008 2008 is leap year Variable Used : Variables yr Datatypes int Description Stores year 8. WAP to find that a number is single digit or not. import java.io.*; class Pro8 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter any number : "); String v1 = in.readLine(); int x = Integer.parseInt(v1); if(x < 10) // checking for single digit System.out.println(x + " is single digit "); else System.out.println(x + " is not a single digit "); } } Output: Enter any number : 5 5 is single digit Variable Used : Variables x Datatypes int Description Stores the value 9. WAP to print that a character is a vowel or a consonant using if else. import java.io.*; class Pro10 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter a character: "); char ch =(char)in.read(); // to take character input through keyboard if( ch=='a' || ch=='e' || ch=='i' || ch=='o' || ch=='u' || ch=='A' || ch=='E' ||ch=='I' || ch=='O' || ch=='U') // checking whether character is vowel System.out.print("It is a vowel"); else System.out.println("It is a consonant"); } } Output: Enter a character: u It is a vowel Variable Used : Variables ch Datatypes char Description Stores a character 10. WAP to print the numeric value entered by a user in words using switch case. import java.io.*; class Pro10 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter a single digit value : "); String v1 = in.readLine(); int d = Integer.parseInt(v1); switch(d) // checking the value of variable d { case 0: System.out.println("ZERO"); break; case 1: System.out.println("ONE"); break; case 2: System.out.println("TWO"); break; case 3: System.out.println("THREE"); break; case 4: System.out.println("FOUR"); break; case 5: System.out.println("FIVE"); break; case 6: System.out.println("SIX"); break; case 7: System.out.println("SEVEN"); break; case 8: System.out.println("EIGHT"); break; case 9: System.out.println("NINE"); break; default: System.out.println("INVALID"); } } } Output: Enter a single digit value : 6 SIX Variable Used : Variables d Datatypes int Description Stores the value 11. WAP to calculate total, average and grade for a student for 5 subjects. import java.io.*; class Pro11 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter marks in 5 subjects : "); String v1 = in.readLine(); int ss = Integer.parseInt(v1); String v2 = in.readLine(); int eng = Integer.parseInt(v2); String v3 = in.readLine(); int maths = Integer.parseInt(v3); String v4 = in.readLine(); int sci = Integer.parseInt(v4); String v5 = in.readLine(); int comp = Integer.parseInt(v5); int total = ss + eng + maths + sci + comp; //Computing total marks double avg = total/5.0; //Computing average char grade; if(avg >= 70) //Calculating grade grade = 'A'; else if(avg >= 60) grade = 'B'; else if(avg >= 45) grade = 'C'; else grade = 'D'; System.out.println("Total : " + total); System.out.println("Average : " + avg); System.out.println("Grade : " + grade); } } Output: Enter marks in 5 subjects : 98 99 100 95 99 Total : 491 Average : 98.2 Grade : A Variable Used : Variables ss Datatypes int Description Stores ss marks eng maths sci total avg grade int int int int double char Stores English marks Stores Maths marks Stores Science marks Stores calculated total marks Stores calculated average Stores grade 12. WAP to print that a character is a vowel or a consonant using switch case. import java.io.*; class Pro12 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter Character : "); char c = (char)in.read(); // To take character input through keyboard switch(c) //Checking for vowel { case 'A': case 'E': case 'I': case 'O': case 'U': case 'a': case 'e': case 'i': case 'o': case 'u': System.out.println("It is a vowel"); break; default: System.out.println("It is a consonant"); } } } Output: Enter Character : i It is a vowel Variable Used : Variables c Datatypes char Description Stores a character 13. WAP to find that the entered character is a number, upper case, lower case or a special character using if-else-if. import java.io.*; class Pro12 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter Character : "); char c = (char)in.read(); char i; if(c>='A'&&c<='Z') //Checking for uppercase System.out.println(c+" is uppercase"); else if(c>='a'&&c<='z') //Checking for lowercase System.out.println(c+" is lowercase"); else if(c>='0'&&c<='9') //Checking for digit System.out.println(c+" is digit"); else System.out.println(c+" is a special character"); } } Output: Enter Character : * * is a special character Variable Used : Variables Datatypes Description c char Stores a character 14. WAP to calculate area of rectangle, circle, sphere and square using switch case. import java.io.*; class Pro14 { public static void main(String args[])throws IOException { InputStreamReader ir=new InputStreamReader(System.in); BufferedReader in=new BufferedReader(ir); System.out.println("1.Area of Square"); System.out.println("2.Area of Rectangle"); System.out.println("3.Area of Circle"); System.out.println("4.Area of Sphere"); System.out.println("Enter choice"); String v1=in.readLine(); int ch=Integer.parseInt(v1); switch(ch) { case 1: //For area of square System.out.println("Enter side"); String v2=in.readLine(); int s=Integer.parseInt(v2); int area1 = s*s; System.out.println("Area = "+area1); break; case 2: //For area of rectangle System.out.println("Enter length"); String v4=in.readLine(); int l=Integer.parseInt(v4); //Accepting length System.out.println("Enter breadth"); String v5=in.readLine(); int b=Integer.parseInt(v5); //Accepting breadth int area2 = l*b; System.out.println("Area = " + area2); break; case 3: //For area of circle System.out.println("Enter radius"); String v6=in.readLine(); int r=Integer.parseInt(v6); //Accepting radius double area3 = 3.14*r*r; System.out.println("Area = "+ area3); break; case 4: //For area of sphere System.out.println("Enter radius "); String v8=in.readLine(); int rad =Integer.parseInt(v8); double area4 = 4*3.14*rad*rad; System.out.println("Area = "+area4); break; default: System.out.println("Invalid Choice"); } } } Output: 1.Area of Square 2.Area of Rectangle 3.Area of Circle 4.Area of Sphere Enter choice 3 Enter radius 2 Area = 12.56 Variable Used : Variables ch s area1 l b area2 r area3 rad area4 Datatypes int int int int int int int double int double 15. WAP to calculate +, -, *, /, % using switch case. import java.io.*; class Pro15 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter two numbers : "); String v1 = in.readLine(); int x = Integer.parseInt(v1); String v2 = in.readLine(); int y = Integer.parseInt(v2); System.out.print("Enter operator + - * / % : "); char op = (char) in.read(); //To input the operator switch(op) //Checking the operator { case '+': System.out.println((x+y)); break; case '-': System.out.println(x-y); break; case '*': System.out.println(x*y); break; case '/': Description Stores the choice of user Stores length of side of square Stores area of square Stores length of rectangle Stores breadth of rectangle Stores area of rectangle Stores the radius of circle Stores area of circle Stores radius of sphere Stores area of sphere System.out.println(x/y); break; case '%': System.out.println(x%y); break; default: System.out.println("INVALID CHOICE"); } } } Output: Enter two numbers : 6 5 Enter operator + - * / % : * 30 Variable Used : Variables op Datatypes char Description Stores the operator 16. WAP to find factorial of a number using while loop. import java.io.*; class Pro16 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter any number : "); String v1 = in.readLine(); int x = Integer.parseInt(v1); int i, fact = 1; //Declaring & Initialising variable fact to 1 for(i = x; i >= 1; i--) { fact = fact * i; //Calulating factorial } System.out.println("Factorial of " + x + " is " + fact); } } Output: Enter any number : 5 Factorial of 5 is 120 Variable Used : Variables Datatypes Description x int To accept a number i fact int int Looping variable To store factorial of number 17. WAP to print any number in reverse order using for loop. import java.io.*; class Pro17 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter any number : "); String v1 = in.readLine(); int x = Integer.parseInt(v1); int rem, rev = 0; for(;x != 0;) //Loop runs till x equals 0 { rem = x%10; /Extracting last digit rev = rev * 10 + rem; //calculating reverse x=x/10; } System.out.println("Reverse is " + rev); } } Output: Enter any number : 456 Reverse is 654 Variable Used : Variables x rem rev Datatypes int int int Description To accept a number To extract last digit To store reverse of number 18. WAP to print any number in reverse order using do while loop. import java.io.*; class Pro17 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter any number : "); String v1 = in.readLine(); int x = Integer.parseInt(v1); int rem, rev = 0; do { rem = x%10; //Extracting last digit rev = rev * 10 + rem; // Reversing the number x=x/10; } while(x!=0); System.out.println("Reverse is " + rev); } } Output: Enter any number : 456 Reverse is 654 Variable Used : Variables x rem rev Datatypes int int int Description To accept a number To extract last digit To store reverse of number 19. WAP to input any number and print if it is an Armstrong number. [Hint: 153 is an Armstrong number in which the sum of cube of each digit is equal to the number itself]. import java.io.*; class Pro19 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter any number : "); String v1 = in.readLine(); int x = Integer.parseInt(v1); int rem, cube, sum = 0, y = x; for(;x != 0;) //Loop runs till x becomes 0 { rem = x%10; // Extracting last digit cube = rem * rem * rem; //Calculating cube of each digit sum = sum + cube; //Calculating sum of cubes x=x/10; } if(y == sum) System.out.println(y + " is an armstrong number"); else System.out.println(y + " is not an armstrong number"); } } Output: Enter any number : 153 153 is an armstrong number Variable Used : Variables x rem cube sum y Datatypes int int int int int Description To accept a number To extract last digit To store reverse of number 20. WAP to enter any number and print if it is a perfect number. [Hint: A number is said to be perfect if it is equal to the sum of all its factors. Eg: 6=1+2+3=6]. import java.io.*; class Pro20 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter any number : "); String v1 = in.readLine(); int x = Integer.parseInt(v1); int i, sum = 0; for(i = 1; i < x ; i++) { if(x%i == 0) sum = sum + i; } if(x == sum) System.out.println(x + " is a perfect number"); else System.out.println(x + " is not a perfect number"); } } 21. WAP to enter a number and print the multiplication table till n. import java.io.*; class Pro21 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter any number : "); String v1 = in.readLine(); int x = Integer.parseInt(v1); System.out.print("Enter limit : "); String v2 = in.readLine(); int n = Integer.parseInt(v2); int i; for(i = 1; i <= n ; i++) { System.out.println(x + "*" + i + "=" + x*i); } } } 22. WAP to print even and odd number till n in descending order and calculate the sum of even and odd number. Print it in proper format. import java.io.*; class Pro22 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter value of x: "); String v1 = in.readLine(); int x = Integer.parseInt(v1); int i, sume=0, sumo=0; System.out.println("Printing even numbers in reverse order "); for(i = x; i >=1; i--) { if(i%2==0) { System.out.println(i); sume=sume+i; } } System.out.println("Sum of even numbers " + sume); System.out.println("Printing odd numbers in reverse order "); for(i = x; i >=1; i--) { if(i%2!=0) { System.out.println(i); sumo=sumo+i; } } System.out.println("Sum of odd numbers " + sumo); } } 23. WAP to print Fibonacci series till n. import java.io.*; class UptoNFibo { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter value of n : "); String v1 = in.readLine(); int n = Integer.parseInt(v1); int last = 1, prev = 1, curr; System.out.print(last + "\t" + prev + "\t"); while(true) // always true : infinite loop { curr = last + prev; if(curr <= n) { System.out.print(curr + "\t"); last = prev; prev = curr; } else break; // to come out of infinite loop } } } 24. WAP to calculate the following Series: a) S = 1 – 2 + 3 – 4 ………………………….N import java.io.*; class S1 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter value of n : "); String v1 = in.readLine(); int n = Integer.parseInt(v1); int i, sum = 0; for(i=1;i<=n;i++) { if(i%2==0) sum=sum-i; else sum=sum+i; } System.out.println("==============="); System.out.println("Sum of series = " +sum); } } b) S = 1*2 + 2*3 + 3*4 …………………..9*10 import java.io.*; class S2 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter value of n : "); String v1 = in.readLine(); int n = Integer.parseInt(v1); int i; double sum = 0.0; for(i=1;i<n;i++) { sum = sum + i*(i+1); } System.out.println("==============="); System.out.println("Sum of series = " + sum); } } c) S = 1^1 + 2^2 + 3^3 …………………..N^N import java.io.*; class S3 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter value of n : "); String v1 = in.readLine(); int n = Integer.parseInt(v1); int i; double sum = 0.0; for(i=1;i<=n;i++) { sum = sum + Math.pow(i,i); } System.out.println("==============="); System.out.println("Sum of series = " + sum); } } d) S= 1^1 + 3^3 + 5^5 …………………..N^N import java.io.*; class S4 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter value of n : "); String v1 = in.readLine(); int n = Integer.parseInt(v1); int i; double sum = 0.0; for(i=1;i<=n;i+=2) { sum = sum + Math.pow(i,i); } System.out.println("==============="); System.out.println("Sum of series = " + sum); } } e) S= 2^2 + 3^3 + 4^4 …………………..N^N import java.io.*; class S5 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter value of n : "); String v1 = in.readLine(); int n = Integer.parseInt(v1); int i; double sum = 0.0; for(i=2;i<=n;i++) { sum = sum + Math.pow(i,i); } System.out.println("==============="); System.out.println("Sum of series = " + sum); } } f) S = 1 + X + X^2 + ……………………….X^N import java.io.*; class S6 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter value of n : "); String v1 = in.readLine(); int n = Integer.parseInt(v1); System.out.print("Enter value of x : "); String v2 = in.readLine(); int x = Integer.parseInt(v2); int i; double sum = 1.0; for(i=1;i<=n;i++) { sum = sum + Math.pow(x,i); } System.out.println("==============="); System.out.println("Sum of series = " + sum); } } g) S = 1 + x2/2 + x2/3 + x2/4 +……………xn/n import java.io.*; class S7 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter value of n : "); String v1 = in.readLine(); int n = Integer.parseInt(v1); System.out.print("Enter value of x : "); String v2 = in.readLine(); int x = Integer.parseInt(v2); int i; double sum = 1.0; for(i=2;i<=n;i++) { sum = sum + Math.pow(x,2)/i; } System.out.println("==============="); System.out.println("Sum of series = " + sum); } } h) S = 1 + 1/3^2 + 1/5^2…………………..10 terms import java.io.*; class S8 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter value of n : "); String v1 = in.readLine(); int n = Integer.parseInt(v1); int i; double sum = 1.0; for(i=3;i<=n;i+=2) { sum = sum + 1/(Math.pow(i,2)); } System.out.println("==============="); System.out.println("Sum of series = " + sum); } } i) S = 1 + (1+2) + (1+2+3) +……………..+ (1+2+3+……+N) import java.io.*; class S9 { public static void main(String [] args) throws IOException { InputStreamReader r=new InputStreamReader(System.in); BufferedReader in=new BufferedReader(r); System.out.print("Enter value of n : "); String v1=in.readLine(); int n=Integer.parseInt(v1); int s=0,sum = 0,i; for(i=1;i<=n;i++) { s = s + i; sum = sum + s; } System.out.println("Sum of series = " +sum); } } j) S= 1! + 2! + 3! .................N! import java.io.*; class S10 { public static void main(String [] args) throws IOException { InputStreamReader r=new InputStreamReader(System.in); BufferedReader in=new BufferedReader(r); System.out.print("Enter value of n : "); String v1=in.readLine(); int n=Integer.parseInt(v1); int f = 1, i, sum = 0; for(i=1;i<=n;i++) { f = f * i; sum = sum + f; } System.out.println("==============="); System.out.println("Sum of series = " + sum); } } k) S= 1! + 3! + 5! .................N! import java.io.*; class S11 { public static void main(String [] args) throws IOException { InputStreamReader r=new InputStreamReader(System.in); BufferedReader in=new BufferedReader(r); System.out.print("Enter value of n : "); String v1=in.readLine(); int n=Integer.parseInt(v1); int f = 1, j, i, sum = 0; for(i=1;i<=n;i+=2) { f=1; for(j=i;j>=1;j--) { f = f * j; } sum = sum + f; } System.out.println("==============="); System.out.println("Sum of series = " + sum); } } l) S= 1/1! +2/ 2! +3/ 3! .................N/N! import java.io.*; class S12 { public static void main(String [] args) throws IOException { InputStreamReader r=new InputStreamReader(System.in); BufferedReader in=new BufferedReader(r); System.out.print("Enter value of n : "); String v2=in.readLine(); int n=Integer.parseInt(v2); int i,j; double f,sum=0.0; for(i=1;i<=n;i++) { f = 1; for(j=1;j<=i;j++) { f = f * j; } sum= sum + i/f; } System.out.println("Sum of series = " +sum); } } m) S= X/1! +X/ 2! +X/ 3! .................X/N! import java.io.*; class S13 { public static void main(String [] args) throws IOException { InputStreamReader r=new InputStreamReader(System.in); BufferedReader in=new BufferedReader(r); System.out.print("Enter value of x : "); String v1=in.readLine(); int x=Integer.parseInt(v1); System.out.print("Enter value of n : "); String v2=in.readLine(); int n=Integer.parseInt(v2); int i,j; double f,sum= 0; for(i=1;i<=n;i++) { f = 1; for(j=1;j<=i;j++) { f = f * j; } sum = sum + x/f; } System.out.println("Sum of series = " +sum); } } n) S = 1 + X^4 + X^6 + X^8 ……………..X^N import java.io.*; class S14 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter value of x : "); String v1 = in.readLine(); int x = Integer.parseInt(v1); System.out.print("Enter value of n : "); String v2 = in.readLine(); int n = Integer.parseInt(v2); int i; double sum =x; for(i=4;i<=n;i+=2) { sum = sum + Math.pow(x,i); } System.out.println("==============="); System.out.println("Sum of series = " + sum); } } o) S = X^N + X^(N-1) + X^(N-2) ……………..1 import java.io.*; class S15 { public static void main(String [] args) throws IOException { InputStreamReader r = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(r); System.out.print("Enter value of x : "); String v1 = in.readLine(); int x = Integer.parseInt(v1); System.out.print("Enter value of n : "); String v2 = in.readLine(); int n = Integer.parseInt(v1); int i; double sum =0.0; for(i=n; i>=0; i--) { sum = sum + Math.pow(x,i); } System.out.println("==============="); System.out.println("Sum of series = " + sum); } } p) S = 1 - X^2/2! + X^3/3! - X^4/4! ……………..X^N/N! import java.io.*; class S16 { public static void main(String [] args) throws IOException { InputStreamReader r=new InputStreamReader(System.in); BufferedReader in=new BufferedReader(r); System.out.print("Enter value of x : "); String v1=in.readLine(); int x=Integer.parseInt(v1); System.out.print("Enter value of n : "); String v2=in.readLine(); int n=Integer.parseInt(v2); int i,j; double f,sum= 1; for(i=2;i<=n;i++) { f = 1; for(j=1;j<=i;j++) { f = f * j; } if(i%2==0) sum = sum - Math.pow(x,i)/f; else sum = sum + Math.pow(x,i)/f; } System.out.println("Sum of series = " +sum); } } 25. Pattern a) * ** *** **** class Pattern1 { public static void main(String [] args) { int i,j; for (i=1;i<=4;i++) { for(j=1;j<=i;j++) { System.out.print("*"); } System.out.println(); } } } b) 1 22 333 4444 class Pattern2 { public static void main(String [] args) { int i,j; for (i=1;i<=4;i++) { for(j=1;j<=i;j++) { System.out.print(i); } System.out.println(); } } } c) 1 12 123 1234 class Pattern3 { public static void main(String [] args) { int i,j; for (i=1;i<=4;i++) { for(j=1;j<=i;j++) { System.out.print(j); } System.out.println(); } } } d) 4444 333 22 1 class Pattern4 { public static void main(String [] args) { int i,j; for (i=4;i>=1;i--) { for(j=1;j<=i;j++) { System.out.print(i); } System.out.println(); } } } e) 4321 432 43 4 class Pattern5 { public static void main(String [] args) { int i,j; for (i=1;i<=4;i++) { for(j=4;j>=i;j--) { System.out.print(j); } System.out.println(); } } } f) 1111 222 33 4 class Pattern6 { public static void main(String [] args) { int i,j; for (i=1;i<=5;i++) { for(j=5;j>=i;j--) { System.out.print(i); } System.out.println(); } } } g) 1234 123 12 1 class Pattern7 { public static void main(String [] args) { int i,j; for (i=4;i>=1;i--) { for(j=1;j<=i;j++) { System.out.print(j); } System.out.println(); } } } h) a ab abc abcd class Pattern8 { public static void main(String [] args) { char i,j; for (i='a';i<='d';i++) { for(j='a';j<=i;j++) { System.out.print(j); } System.out.println(); } } } i) a bb ccc dddd class Pattern9 { public static void main(String [] args) { char i,j; for (i='a';i<='d';i++) { for(j='a';j<=i;j++) { System.out.print(i); } System.out.println(); } } }