Computing the square root of a given number using Newton method's.

sqrt.java

import java.util.Scanner ;

public class sdz {

    public static void main(String[] args) {

       Scanner sc = new  Scanner(System.in);   
       System.out.println(squaroot(2,16,0.05));
}
static double squaroot(int start, double number , double precision){

    double u0 = start;
    double un;

    do {

        un = u0;
        u0 = 0.5*(un + number/un);
    }while(Math.abs(un-u0)> precision);

    return u0;

}