Having issues with loops

Question

Im having problems with a loop I made. It gets the right answers but it keeps on looping. I know it's because of the while(true) section, but I cant see where a break (if needed) should be. Is there a better way to write this? Also why does it only work when I add the second System.out.println? I was hoping it would loop till the condition was met

Thanks

import java.util.Scanner;

public class babyalgo
{

    private float a ; //the Number that the user is finding the sqrt of
    private float x1 = 2 ; // the starting guess 
    private double x2;
    /**
     * Constructor for objects of class babyalgo
     */
    public  void main (String[] args)
    {
        // initialise instance variables

        Scanner scan = new Scanner(System.in); // creating a scanner to take the user input
        System.out.println("Please enter your the number you wish to square root");
        float a = scan.nextInt();

        while (true){
            if (x1* x1 == a){
               System.out.println("Your final answer is" +" " +  x1);
            }

            else {
                x1 = (x1 +(a/x1))/2;
                System.out.println("Your final answer is" +" " +  x1);                 
            }
        }
    }

}

Answer 1

Why not use a do while loop so it executes at least once and then evaluate a condition for it to exit? Maybe I need a better explanation of what you're trying accomplish.

Answer 2

First of all you have no break statement in you loop.
Also you have wrong comparison statement x1 * x1 == a.
You can read more by the link https://howtodoinjava.com/java/basics/correctly-compare-float-double/

Answer 3

You should loop while the condition is not true , so while(... .=...) . Then within the while loop you can implement the change of x1 and after the while loop you can print out the result.