Finding Square Roots in Java

import java.util.Scanner; //scanner class is needed for user input
 
public class squareroot
{
 
    public static void main(String[] args)
    {
	Scanner input = new Scanner(System.in); //creates new scanner for user input
 
	double n; //declares n, a variable that the user will give a value to
 
	System.out.print("Enter a number to calculate its square root: ");
 
	n = input.nextDouble(); //assigns user input value to n
 
	root(n); //runs root method and passes the value of n to it
 
	System.out.println(); //linebreak for neatness
 
    }
 
    public static void root(double x) //root method accepts value passed to it as "x"
    {
 
	double y = Math.sqrt(x); //uses the Math.sqrt method in Java to calculate the square root and assigns it to y
 
	System.out.printf("The square root of  " + x + " is approximately %.4f", y); //types out the result, and formats the square root to four decimal places
 
    }
 
}