Thread: Java Noob - Terminating loop.

Hi, I am currently building a Menu driven calculator, and i have got my loop to go, but now when the user enters " 6 " from the menu - the program does not terminate. How can i get this to end?

I also tried using a " Break;" but it didnt seem to end anything

import java.util.Scanner;
 
public class MenuDrivenCalculator {
	// Main menu
	public static void main(String[] args) {
		// Create Scanner
		Scanner input = new Scanner(System.in);
		int invalid = 0;
		while (invalid <= 3) {
			System.out.println(" Menu: ");
			System.out.println("1. Add ");
			System.out.println("2. Sub ");
			System.out.println("3. Multiply ");
			System.out.println("4. Divide ");
			System.out.println("5. Generate a Random Number");
			System.out.println("6. Quit");
			// Complete the input on what you would like to do.
			System.out.println(" What would you like to do?");
			int menuNumber = input.nextInt();
 
			if (menuNumber < 1) {
				System.out.println("Im Sorry " + menuNumber
						+ " is not an option on the menu");
				invalid = invalid + 1;
			}
			if (menuNumber > 6) {
				System.out.println("Im Sorry " + menuNumber
						+ " is not an option on the menu");
				invalid = invalid + 1;
			}
 
			if (menuNumber == 1) {
				System.out.println("What is the first Number?:");
				int number1 = input.nextInt();
				System.out.println("What is the Second Number?:");
				int number2 = input.nextInt();
				int answer = number1 + number2;
				System.out.println("Answer : " + answer);
				invalid = 0;
			}
			if (menuNumber == 2) {
				System.out.println("What is the first Number?:");
				int number1 = input.nextInt();
				System.out.println("What is the Second Number?:");
				int number2 = input.nextInt();
				int answer = number1 - number2;
				System.out.println("Answer : " + answer);
				invalid = 0;
			}
			if (menuNumber == 3) {
				System.out.println("What is the first Number?:");
				int number1 = input.nextInt();
				System.out.println("What is the Second Number?:");
				int number2 = input.nextInt();
				int answer = number1 * number2;
				System.out.println("Answer : " + answer);
				invalid = 0;
 
			}
			if (menuNumber == 4) {
				System.out.println("What is the first Number?:");
				int number1 = input.nextInt();
				System.out.println("What is the Second Number?:");
				int number2 = input.nextInt();
 
				if (number2 != 0) {
					System.out.println(number1 / number2);
					// Divides first number by second number
				} else if (number2 == 0) {
					System.out.println("I'm sorry, you cannot divide by zero.");
					invalid = 0;
				}
				if (menuNumber == 5) {
					System.out.println("What is the lower limit?:");
					int min = input.nextInt();
					System.out.println("What is the upper limit?:");
					int max = input.nextInt();
 
					int answer = (int) (Math.ceil(Math.random() * (max - min)) + min);
 
					System.out.println("Answer: " + answer);
					invalid = 0;
				}
 
				if (menuNumber == 6) {
					System.exit(0); 
				}
 
			}
 
		}
	}
}