Assignment #74 and Safe Square Root

Code

    /// Name: Ali Kurland
    /// Period: 6
    /// Program Name: Safe Square Root
    /// File Name: SafeSquareRoot.java
    /// Date Finished: 10/19/2015
    
    import java.util.Scanner;
    
    public class SafeSquareRoot
    {
        public static void main( String[] args )
        {
            Scanner keyboard = new Scanner(System.in);
            double n, root;
            
            System.out.println( "SQUARE ROOT!" );
            System.out.print( "Enter a number: " );
            n = keyboard.nextInt();
            
            while ( n <= 0 )
            {
            System.out.println( "You can't take the square root of a negative number, silly." );
            System.out.print( "Try again: " );
            n = keyboard.nextInt();
            }
            
            root = Math.sqrt(n);
            System.out.println( "The square root of " + n + " is " + root + ".\n" );
        }
    }
    

Picture of the output