ReadNum

package com;

import java.util.Scanner;

public class ReadNumber
{
  public static void main(String[] args)
  {
    Scanner scanner = new Scanner(System.in);
    double inputNum= Double.parseDouble(scanner.nextLine()); //TO DO check the input is negative zero or not a number
    double output = Math.sqrt(inputNum);
    System.out.printf("%.5f",output);
  }
}