Assignment #74 and Safe Square Root

Code

///John Mulligan
///period 5
///Program Name: SafeSquareRoot
///File Name: SafeSquareRoot.java


    import java.util.Scanner;
        
        public class SafeSquareRoot
        {
            public static void main(String[] args)
            {
                Scanner keyboard = new Scanner(System.in);
                 
                double input, sroot;
                
                System.out.println("SQUARE TOOT!");
                System.out.print("Enter a #: ");
                input = keyboard.nextDouble();
                
                while (input < 0)
                {
                    System.out.println("You can not take the square root of a negative number!");
                    System.out.print("Try again: ");
                    input  =keyboard.nextDouble();
                }
                
                sroot = Math.sqrt(input);
                
                System.out.println("the square toot of " + input + " is " + sroot );
            }
        }