A while loop is really useful when you don’t know the exact number of times you have to repeat

While hacker is trying to hack my computer, give error message.

Theory

A while method will keep going until it reaches the condition to stop.

IN CODE LANGUAGE

void start () {
	Scanner hackerGivesInput = new Scanner(System.in);
	while(hackerGivesInput.hasNextLine()) {
		System.out.println("Error Bitch");
		break;
	}
	start();
}

1. So I use the Scanner to get input from my a user.
   Scanner hackerGivesInput = new Scanner(System.in);

   I name it hackerGivesInput because this is a small example, I assume that every input that I will get is from the hacker.

2. Don’t forget to import the Scanner Class, HOW?
   import java.util.Scanner;

3. To create an unlimited load of errors when the hacker types something
   while(hackerGivesInput.hasNextLine()) {
   	System.out.println("Error Bitch");
   }

   use scanner method: hasNextLine(); or hasNext();

4. To do it only when we get input add:
   void start () {
   	Scanner hackerGivesInput = new Scanner(System.in);
   	while(hackerGivesInput.hasNextLine()) {
   		System.out.println("Error Bitch");
   		break;
   	}
   	start();
   }

   1. break;
      1. stops the while loop
   2. start();
      1. restarts, the start method again
5. even shorter, is directly restart the start method
   void start () {
   	Scanner hackerGivesInput = new Scanner(System.in);
   	while(hackerGivesInput.hasNextLine()) {
   		System.out.println("Error Bitch");
   		start();
   	}
   }

SAME AS FOR-LOOP

In a while-loop, you could do the same thing as we did in the for-loop;

Of course it will look different:

void start () {
	int count = 0;
	while (count <= 4) {
		System.out.println("WHAT ARE THOOOSEE!");
		count++;
	}
}

As you can see you have to keep track of the counting to let the loop stop.