Here is the simple C Program To Calculate Interest.

Question:

(Interest Calculator) The simple interest on a loan is calculated by the formula

interest = principal * rate * days / 365;

The preceding formula assumes that rate is the annual interest rate, and therefore includes the

division by 365 (days). Develop a program that will input principal, rate and days for several

loans, and will calculate and display the simple interest for each loan, using the preceding formula.

Source Code:

#include <stdio.h>

#include <stdlib.h>

int main()

{

    int term;

    float principal,rate,interest;

    while (term>=0){

    printf("Enter loan principal (-1 to end): ");

    scanf("%f",&principal);

    if (principal==-1)

        break;

    printf("Enter interest rate: ");

    scanf("%f",&rate);

    printf("Enter term of the loan in days: ");

    scanf("%d",&term);

    interest = principal * rate * term / 365;

    printf("The interest charge is $%.2f\n",interest);

    }

    return 0;

}

Note:

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