# 19 : C Program to Compute Simple Interest (SI)

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In order to calculate Simple Interest you need to know Principle Amount, Rate and Duration values. You need to get these values from user using scanf fuction.

Variables :

1. principle : (Datatype int) : to hold principle amount entered by user.

1. rate : (Datatype int) : to hold rate entered by user.

1. duration : (Datatype int) : to hold duration entered by user.

2. simpleInterest : (Datatype fload) : To hold Simple Interest calculated

Formula :

SI = (Principle x Rate x Duration)/100

Functions :

printf() : is used to display something on the console/screen. Format specifier %d in printf function is used to display a int variable on screen. \n is used to add a newline

scanf() : is used to fetch data inputted by the user on the console/screen using keyboard. %d in scanf is indicates that inputted text is of type int.

/*
* 1000+ C programs + tutorials
*
*
* 19_compute_simple_interest.c
*
*
*  Created on: Oct 20, 2014
*  Author: Code2care.org
*/

#include
//#include

void main() {

int principle;
int rate;
int duration;
float simpleInterest;

//	clrscr();

printf(" Simple Interest Calcuation :  ");

printf("\n\n Enter Principle Amount : ");
scanf("%d", &principle);

printf("\n\n Enter Rate of Interest : ");
scanf("%d", &rate);

printf("\n\n Enter Duration : ");
scanf("%d", &duration);

simpleInterest = (principle*duration*rate)/100;

printf("\n\nSimple Interest :  %lf  \n",simpleInterest);

//	getch();

}

• Output :

Simple Interest Calcuation : 10000

Enter Principle Amount : 5

Enter Rate of Interest : 10

Enter Duration :

Simple Interest : 5000.000000

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