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Retirement_WhileTest.java

+import java.util.Scanner;
+
+/**
+ * This program demonstrates a <code>while</code> loop.
+ *
+ * @author Cay Horstmann
+ * @version 1.20 2004-02-10
+ * @time 2023/01/11
+ */
+
+public class Retirement {
+    public static void main(String[] args) {
+        // read inputs
+        Scanner in = new Scanner(System.in);
+
+        System.out.println("How much money do you need to retire? ");
+        double goal = in.nextDouble();
+
+        System.out.println("How much money will you contribute every year? ");
+        double payment = in.nextDouble();
+
+        System.out.println("Interest rate in %: ");
+        double interestRate = in.nextDouble();
+
+        double balance = 0;
+        int years = 0;
+
+        // update account balance while goal isn't reached
+        while (balance < goal) {
+            // add this year's payment and interest
+            balance += payment;
+            double interest = balance * interestRate / 100;
+            balance += interest;
+            years++;
+        }
+
+        System.out.println("You can retire in " + years + " years.");
+    }
+}