Java: Compute the amount of the debt in n months

Last update on May 13 2025 13:00:11 (UTC/GMT +8 hours)

Compute Loan Debt After N Months

Write a Java program to compute the debt amount in n months. Monthly, the loan adds 4% interest to the $100,000 borrowed and rounds it to the nearest 1,000.

Input:

An integer n (0 ≤ n ≤ 100).

Sample Solution:

Java Code:

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        // Creating a Scanner object for user input
        Scanner s = new Scanner(System.in);

        // Prompting the user to input the number of months
        System.out.println("Input number of months:");

        // Reading the number of months from the user
        int n = s.nextInt();

        // Initializing the principal amount (initial debt) to 100,000
        double c = 100000;

        // Looping through each month to calculate the debt amount
        for (int i = 0; i < n; i++) {
            // Calculating the new debt amount after adding 4% interest
            c += c * 0.04;

            // Checking if the debt amount is not a multiple of 1000
            if (c % 1000 != 0) {
                // Reducing the debt amount to the nearest multiple of 1000
                c -= c % 1000;
                // Adding 1000 to the debt amount
                c += 1000;
            }
        }

        // Printing the final debt amount without decimal places
        System.out.println("\nAmount of debt: ");
        System.out.printf("%.0f\n", c);
    }
}

Sample Output:

Input number of months:
 6

Amount of debt: 
129000

Flowchart:

Flowchart: Java exercises: Compute the amount of the debt in n months.

For more Practice: Solve these Related Problems:

Write a Java program to compute the cumulative loan debt after n months with a variable interest rate each month.
Write a Java program to calculate the remaining loan balance after n months when periodic payments are applied.
Write a Java program to compute loan debt after n months using compound interest with rounding to the nearest hundred.
Write a Java program to simulate loan debt growth over n months incorporating periodic extra payments.

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Java Code Editor:

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