#include <iostream>

#include <cmath>

using namespace std;

int main()

{

double L;

double rate;

int n;

// 2 decimal points

cout.setf(ios::fixed);

cout.precision(2);

// print program title

cout << "Program to calculate Loan Payment" << endl << endl;

cout << "Enter loan amount: ";

cin >> L;

cout << "Enter loan interest rate: ";

cin >> rate;

cout << "Enter number of payments: ";

cin >> n;

// divide rate by 12 for monthly rate

rate = rate / 12;

// calculate payment

double payment = (rate * pow((1+rate),n) /(pow((1+rate),n)-1)) * L;

cout << "Loan amount: $" << L << endl;

cout << "Monthly interest rate: " << rate << "%" << endl;

cout << "Number of payments: " << n << endl;

cout << "Monthly Payment: $" << payment << endl;

cout << "Amount paid back: $" << (payment * n) << endl;

cout << "Interest paid: $" << ((payment * n)-L) << endl;

return 0;

}

#include <cmath>

using namespace std;

int main()

{

double L;

double rate;

int n;

// 2 decimal points

cout.setf(ios::fixed);

cout.precision(2);

// print program title

cout << "Program to calculate Loan Payment" << endl << endl;

cout << "Enter loan amount: ";

cin >> L;

cout << "Enter loan interest rate: ";

cin >> rate;

cout << "Enter number of payments: ";

cin >> n;

// divide rate by 12 for monthly rate

rate = rate / 12;

// calculate payment

double payment = (rate * pow((1+rate),n) /(pow((1+rate),n)-1)) * L;

cout << "Loan amount: $" << L << endl;

cout << "Monthly interest rate: " << rate << "%" << endl;

cout << "Number of payments: " << n << endl;

cout << "Monthly Payment: $" << payment << endl;

cout << "Amount paid back: $" << (payment * n) << endl;

cout << "Interest paid: $" << ((payment * n)-L) << endl;

return 0;

}

Last edited on

The monthly payment on a loan may be calculated by following formula:

Payment = Rate * (1+rate)^n/((1+Rate)^n-1)

Rate is the monthly interest rate, which is the annual interest rate divided by 12.(12% annual interest would be 1 percent monthly interest.) n is the number of payments and L is the amount of loan.

Write a program that asks for these values and displays a report similar to:

Loan amount: $10000.00

Monthly interest rate: 1%

Number of payments: 36

Monthly Payment: $332.14

Amount paid back: $11957.15

Interest paid: $1957.15

my out put comes out

Loan amount: :10000.00

Monthly interest rate:0.08

Number of payments: 36

Monthly Payment: $882.81

Amount paid back: $31781.29

Interest paid: $21871.29

as you can see my out put is wrong because it should comes out like the top one. interest rate is 1% but it shows 0.08%

I dont know why!

.08% looks like you divided 1%/12 rather than 12%/12. I would investigate whether your rate input is coming in as 1 rather than 12.

A suggestion: Don't reuse the value rate. Store annual rate in a separate variable from monthly rate. Then, for the time being, print out both.

Also, when you post code, please place it inside code tags. Click the "<>" button in the Format options and paste your code inside.

Also, your output doesn't match your code. According to your code, the Loan amount should have a "$" in front of it, but your output does not. Please copy and paste rather than re-typing your output, if possible.

A suggestion: Don't reuse the value rate. Store annual rate in a separate variable from monthly rate. Then, for the time being, print out both.

Also, when you post code, please place it inside code tags. Click the "<>" button in the Format options and paste your code inside.

Also, your output doesn't match your code. According to your code, the Loan amount should have a "$" in front of it, but your output does not. Please copy and paste rather than re-typing your output, if possible.

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