Do…while loops in Java, plus a look at variable scoping and multi-line comments. In this tutorial I tackle a task that’s often assigned to beginners on Java courses; looping until the user enters some particular input.

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Code for this tutorial:

import java.util.Scanner;


public class App {

	public static void main(String[] args) {

		
		Scanner scanner = new Scanner(System.in);
		
		/*
		System.out.println("Enter a number: ");
		int value = scanner.nextInt();
		
		while(value != 5) {
			System.out.println("Enter a number: ");
			value = scanner.nextInt();
		}
		*/
		
		int value = 0;
		do {
			System.out.println("Enter a number: ");
			value = scanner.nextInt();
		}
		while(value != 5);
		
		System.out.println("Got 5!");
	}

}

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