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“SIMPLE INTEREST AND COMPOUND INTEREST CALCULATOR” • Mini-Project (OPERATING SYSTEM) • Submitted in partial fulfilment of the requirement of University of Mumbai For the Degree of • (Computer Engineering) • By • SHABARISH SHETTY[B-53] ID NO: TU3F1819132 • AJINKYA THAKUR[B-46] ID NO: TU3F1819123 • MANAS PHANSE[B-40] ID NO: TU3F1819117 • Under the Guidance of Prof. “PRAMILA MATE” Have satisfactorily completed the requirements of the Mini Project Of subject • “Operating System” • As prescribed by the University of Mumbai Under the guidance of • Prof. “Pramila Mate” 1.INTRODUCTION • P.T.O Objective of OS Project on SI and CI calculator: • The main objective of this project is to calculate the SI & CI in faster and in most reliable way. This means you can do multiple calculations in minutes whereas calculations may take more time on paper. What Is Simple Interest? • Simple interest is a quick and easy method of calculating the interest charge on a loan. Simple interest is determined by multiplying the daily interest rate by the principal by the number of days that elapse between payments. • Simple Interest=P×I×N where: P=principle • I=daily interest rate • N=number of days between payments What Is Compound Interest? • Compound interest (or compounding interest) is interest calculated on the initial principal, which also includes all of the accumulated interest of previous periods of a deposit or loan. • Compound Interest = Total amount of Principal and Interest in future • (or Future Value) less Principal amount at present (or Present Value) • = [P (1 + i)n] – P • = P [(1 + i)n – 1] • (Where P = Principal, i = nominal annual interest rate in percentage terms, and n = number of compounding periods.) 2.PROBLEM STATEMENT • Creating a Simple Interest and Compound Interest Calculator using bash script in Linux. • Objective of Project – • The main objective of this project is to create a user friendly and efficient system for calculation of the EMI, which saves the user’s valuable time and efforts. • About shell script: • A shell script is a computer program designed to be run by the Unix shell, a command-line interpreter. • Bash is a command processor that typically runs in a text window where the user types commands that cause actions. Bash can also read and execute commands from a file, called a shell script. • System requirements – • Linux/Unix Operating system • Or • Windows Operating System (With Unix environment provided by Cygwin.exe) • + Notepad / Notepad++ (For Writing Shell Commands) 3.IMPLEMENTATION • • • • • • • • • • #!/usr/bin/env bash while [ 1 ] do echo "Menu" echo "1. Simple Interest" echo "2. Compound Interest" echo "3. Exit" echo "Enter the Choice" read choice case $choice in • • • • • • 1) echo "Enter the value of p,t and r" read p read t read r si=`echo "scale=2;( $p * $t * $r)/100" | bc` echo "Simple Interest = $si" ;; • • • • • • • • 2) echo "enter the value of p, t, r and n" read p read t read r read n power=`expr $n \* $t` echo $power ci=`echo "scale=2; ($p*(1 + $r/$n ) ) ^ $power" | bc` • echo "Compound Interest = $ci" ;; • 3) exit;; • *) echo "Invalid Choice";; • esac • done 4.OUTPUT (Using Cygwin): 5.CONCLUSION • Finally, we have developed a secure, user-friendly EMI calculator system for calculation of EMI. With the help of this system, user can calculate EMI in efficient and in faster way. 6.REFERENCES • https://www.geeksforgeeks.org/simple-calculator-bash/ • (Referred Arithmetic Calculator bash script as a template) • https://www.calculatorsoup.com/calculators/financial/simple-interestplus-principal-calculator.php (Formula for Simple Interest) • https://www.calculatorsoup.com/calculators/financial/compoundinterest-calculator.php (Formula for Compound Interest) Shabharish Shetty Manas Phanse Ajinkya Thakur

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