java - 変数を表示できません

Question

私はプログラミングに非常に慣れていないため、メインメソッドで変数monthlyPaymentを表示するのに問題があります。前回の方法と関係があると思います。これは毎月の支払い計算機です。

import java.util.Scanner;
public class assignment8 {

public static double pow(double a, int b) {
    double ans = 1;
    if (b < 0) {
        for (int i = 0; i < -b; i++) {
            ans *= 1/a;
        }
    }
    return ans;
}

public static double monthlyPayment(double amountBorrowed, int loanLength, int percentage) {
    double monthlyPayment;
    double P = amountBorrowed;
    double N = 12 * loanLength;
    double r = (percentage / 100) / 12;
    monthlyPayment = (r * P) / (1 - Math.pow((1 + r) , -N ));
    return monthlyPayment;
}

public static void main(String[] args) {
    Scanner kbd = new Scanner(System.in);

    System.out.print("Enter the amount borrowed: $");
    double amountBorrowed = kbd.nextDouble();

    System.out.print("Enter the interest rate: ");
    int interestRate = kbd.nextInt();

    System.out.print("Enter the minimum length of the loan: ");
    int minLoanLength = kbd.nextInt();

    System.out.print("Enter the maximum length of the loan: ");
    int maxLoanLength = kbd.nextInt();

    while (maxLoanLength < minLoanLength) {
        System.out.print("Enter the maximum legth og the loan: ");
        maxLoanLength = kbd.nextInt();
    }
    for (int i = minLoanLength; i <= maxLoanLength; i++) {

        System.out.println(i + monthlyPayment);
    }
}   
}