Do-While) Safe Square Root

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        System.out.println("SQUARE ROOT!");
        System.out.print("Please enter a number: ");
        Scanner keyboard = new Scanner (System.in);
        int number = keyboard.nextInt();

        do {
            if (number >=0){
                break;
            }
            System.out.println("\nYou can´t take the square root of a negative number!");
            System.out.print("Try again: ");
            number = keyboard.nextInt();

        } while (number < 0) ;

        double sqrt =  Math.sqrt(number);
        System.out.println("\nThe square root of " + number + " is: " + sqrt);

    }
}