# C Program to Calculate Simple Interest

• Write a C program to read principal amount, rate of interest and time and calculate simple interest.
• Wap in C to find simple interest.

Required Knowledge

We will first read Principle amount, rate of interest and time using scanf function. We will use below mentioned formulae to calculate Simple Interest (SI).

• Simple Interest = (Principle x Rate x Time) / 100

### C program to calculate simple interest

/*
* C program to calculate simple interest
*/

#include <stdio.h>

int main() {
float principle, rate, time, simpleInterest;

/*
* Take Principle, Rate of interest and
* Time as input from user.
*/
printf("Enter Principle Amount\n");
scanf("%f", &principle);
printf("Enter Rate of Interest\n");
scanf("%f", &rate);
printf("Enter Time of Loan\n");
scanf("%f", &time);

/*
* Simple Interest = (Principle X Rate X Time)/100;
*/
simpleInterest = (principle * rate * time)/100;

printf("Simple Interest = %.2f", simpleInterest);

return 0;
}

Output

Enter Principle Amount
10000
Enter Rate of Interest
5
Enter Time of Loan
2
Simple Interest = 1000.00