I want to solve this question for algorithm, please [closed]

Question

Write an algorithm that calculates the monthly payment of a bank loan with a fixed interest-rate. Given the principal amount, the fixed interest rate, the number of years to pay the loan, you can calculate the monthly payment as: 𝑀𝑜𝑛𝑡ℎ𝑙𝑦 𝑝𝑎𝑦𝑚𝑒𝑛𝑡=(𝑃𝑟𝑖𝑛𝑐𝑖𝑝𝑎𝑙𝐴𝑚𝑜𝑢𝑛𝑡×𝐼𝑛𝑡𝑒𝑟𝑒𝑠𝑡𝑅𝑎𝑡𝑒×#𝑦𝑒𝑎𝑟𝑠+𝑃𝑟𝑖𝑛𝑐𝑖𝑝𝑎𝑙𝐴𝑚𝑜𝑢𝑛𝑡)/#𝑚𝑜𝑛𝑡ℎ𝑠 Your program should print the required monthly payment of this loan

Answer 1

Here is working code. Don't forget to input your percentage in fractional form (e.g. $0.02$ for $2\%$).

#include <stdio.h>

#define MONTHS_IN_YEAR 12

float monthlyRepaymentAmount(float principalAmount, float interestRate, int numberOfYears);

int main(void) {
    //Problem statement variables
    float principalAmount; // use int if principal can only be an integer
    float interestRate;
    int numberOfYears;

    //Ask user for problem statement variables
    printf("Please enter the principal amount of the loan: \n");
    scanf("%f", &principalAmount);
    if (principalAmount <= 0) return -1;

    printf("Please enter the interest rate: \n");
    scanf("%f", &interestRate);
    if (interestRate <= 0) return -1;

    printf("Please enter the number of years (term of the loan): \n");
    scanf("%d", &numberOfYears);
    if (numberOfYears <= 0) return -1;

    //Compute and output result
    printf("You need to make monthly loan repayments of $%f \n", \
        monthlyRepaymentAmount(principalAmount, interestRate, numberOfYears));

    return 0;
}

float monthlyRepaymentAmount(float principalAmount, float interestRate, int numberOfYears) {
    return (principalAmount * interestRate * numberOfYears \
            + principalAmount) / (numberOfYears * MONTHS_IN_YEAR);
}