This C Program calculates the simple interest given the principal amount, rate of interest and time. The formula to calculate the simple interest is: simple_interest = (p * t * r) / 100 where p is principal amount, t is time & r is rate of interest.

Here is source code of the C program to calculate the simple interest. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

`/*`

`* C program to find the simple interest, given principal,`

`* rate of interest and time.`

`*/`

`#include <stdio.h>`

void main()

`{`

float principal_amt, rate, simple_interest;

int time;

printf("Enter the values of principal_amt, rate and time \n");

scanf("%f %f %d", &principal_amt, &rate, &time);

simple_interest = (principal_amt * rate * time) / 100.0;

printf("Amount = Rs. %5.2f\n", principal_amt);

printf("Rate = Rs. %5.2f%\n", rate);

printf("Time = %d years\n", time);

printf("Simple interest = %5.2f\n", simple_interest);

`}`

$ cc pgm3.c $ a.out Enter the values of principal_amt, rate and time 12 10 5 Amount = Rs. 12.00 Rate = Rs. 10.00% Time = 5 years Simple interest = 6.00

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If you wish to look at other example programs on Mathematical Functions, go to C Programming Examples on Mathematical Functions. If you wish to look at programming examples on all topics, go to C Programming Examples.