math - Java Pythagorean Theorem -

import java.util.scanner;   public class pythagoreantheorem {          public static void main(string[] args) {           // user input          scanner keyboard = new scanner(system.in);         double sidea, sideb, hypothenuse;           system.out.println("please enter value of sidea");         sidea = keyboard.nextdouble();         system.out.println("please enter value of sideb");         sideb = keyboard.nextdouble();          // find value of hypothenuse         hypothenuse = math.sqrt((sidea*sidea)+(sideb*sideb));          double roundoff = math.round( hypothenuse * 100) / 100;          system.out.println("the length of hypothenuse "  +   roundoff );              }  } 

this code builds doesn't show general output. i'm trying display 2 decimals hypotenuse.

try use this:

 double roundoff = math.round(hypothenuse * 100.0) / 100.0; 

runing code has ex:

 please enter value of sidea  232  please enter value of sideb  454  length of hypothenuse 509.84