using System;

public class Square_Root_Class
{
    public static double calcRoot(double number)
    {
        double root;  	
	    root=number/2;
	    double root_old;
	    do
	    {
	  	    root_old=root;
	    	root=(root_old+number/root_old)/2;
	    } while (Math.Abs(root_old-root)>1.0E-6);
	  	
	    return root;
	}
}