calculation of simple interest by c programming

code

// calculation of simple interest

#include <stdio.h>

int main()

{
    /* i=Simple interest
       p=Principal amount
       r=Rate of interest
       n=Number of years
     */

    int n;
    float p,r,i;

    printf("Enter Principal amount p\n");
    scanf("%f",&p);

    printf("Enter Rate of interest r\n");
    scanf("%f",&r);

    printf("Enter number of years  n\n");
    scanf("%d",&n);

    i=(p*r*n)/100;

    printf("simple interest i = %f",i);

}

output

Enter Principal amount p
1000
Enter Rate of interest r
12
Enter number of years  n
23
simple interest i = 2760.000000