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IT LEARNING
2D Array
Revision
Hasan Ali
Hasan Ali
33019949
import java.util.Scanner;
public class ITLearning {
public static void main(String[]args){
Scanner kbd = new Scanner (System.in);
int [][] array = new int[5][4];
for(int row=0 ; row< array.length ;
row++){
System.out.println("Enter 5 numbers
for row "+row);
for(int col=0 ; col< array[row].length
; col++)
array[row][col]=kbd.nextInt();
}
System.out.println("The sum equals 100 in
row: ");
for(int row=0 ; row< array.length ;
row++){
int sum=0;
for(int col=0 ; col<
array[row].length;col++)
sum+=array[row][col];
if(sum==100)
System.out.println(row);
}
}
}
Hasan Ali
33019949
import java.util.Scanner;
public class ITLearning {
public static void main(String[]args){
Scanner kbd = new Scanner (System.in);
int row , col;
System.out.println("Enter number of rows
and columns: ");
row= kbd.nextInt();
col= kbd.nextInt();
int [][] array=new int[row][col];
for(int i=0 ; i< array.length ; i++){
System.out.println("Enter elements for
row "+i);
for(int k=0 ; k< array[i].length;k++)
array[i][k]=kbd.nextInt();
}
int sum1 =0;
for(int k=0 ; k<col ; k++)
sum1+=array[0][k];
boolean magic=true;
for(int i=1 ; i< array.length ; i++){
int sum2=0;
for(int k=0 ; k< array[i].length ;
k++)
sum2+=array[i][k];
if(sum1!=sum2){
magic=false;
break;
Hasan Ali
33019949
}
}
if(magic==false)
System.out.print("The array is not
Row-Magic");
else
System.out.print("The array is RowMagic");
}
}
Hasan Ali
33019949
import java.util.Scanner;
public class ITLearning {
public static void main(String[]args){
Scanner kbd = new Scanner (System.in);
int [][] matrix = new int[3][4];
System.out.println("Enter Matrix:");
for(int row=0 ; row< matrix.length ;
row++){
for(int col=0 ; col<
matrix[row].length ; col++)
matrix[row][col]=kbd.nextInt();
}
int[][] matrixT = new int[4][3];
for(int i=0 ; i<4 ; i++){
for(int k=0 ; k<3 ; k++)
matrixT[i][k]=matrix[k][i];
}
System.out.println("Transpose of the
Matrix is:");
for(int i=0 ; i<4 ; i++){
for(int k=0 ; k<3 ; k++)
System.out.print(matrixT[i][k]+"
");
Hasan Ali
33019949
System.out.println(" ");
}
}
}
Hasan Ali
33019949
import java.util.Scanner;
public class ITLearning {
public static void main(String[]args){
Scanner kbd = new Scanner (System.in);
//1int n;
System.out.print("Enter number of
students: ");
n=kbd.nextInt();
double [][] marks= new double[n][5];
//2for(int i=0 ; i<n ;i++){
System.out.println("Enter the marks
for student "+i);
for(int k=0 ; k<5 ; k++)
marks[i][k]= kbd.nextDouble();
Hasan Ali
33019949
}
//3double [][] rmarks= new double[n][5];
for(int i=0; i<n ;i++){
int col=4;
for(int k=0 ; k<5 ; k++)
rmarks[i][k]=marks[i][col--];
}
//4for(int i=0 ; i<n ; i++){
if(marks[i][2]>=5.0)
marks[i][2]+=2;
}
//5System.out.println("Marks Array:");
for(int i=0 ; i<n ; i++){
for (int k=0 ; k<5 ; k++)
System.out.print(marks[i][k]+"
");
System.out.println(" ");
}
System.out.println("rMarks Array:");
for(int i=0 ; i<n ; i++){
for (int k=0 ; k<5 ; k++)
System.out.print(rmarks[i][k]+"
");
System.out.println(" ");
}
}
}
Hasan Ali
33019949
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