public class squart {
  public static void main( String[] args ) {
    try {
      //checks the command line for the argument to input into the function
      System.out.println("Input a number:");
      java.util.Scanner sc = new java.util.Scanner( System.in);
      while (sc.hasNext()){
        String x = sc.next();

        //find the squareroot of the parameter
        double ans = Math.sqrt( Integer.parseInt(x) );

        //formats it to have two decimals
        String numberAsString = String.format ("%.2f", ans);

        //prints ans
        System.out.println("Math.sqrt(" + x + ")=" + numberAsString );

        //exits after the answer is returned
        System.exit(0);
      }
    }
    catch (Exception e) {
      /* This is a generic Exception handler which means it can handle
      * all the exceptions. This will execute if the exception is not
      * handled by previous catch blocks.
      */
      System.out.println("Exception occurred. Make sure it is a number!");
    }
  }
}