Hi,

I copied this code from a book, any while it will compile, I get an exception error when I try to run it. Any idea what the issue is?

class Power

{

public static void main ( String[] args )

{

int num = Integer.parseInt( args[0] ) ;

int square = (int) Math.pow( num, 2 ) ;

int cube = (int) Math.pow( num, 3 ) ;

int sqrt = (int) Math.sqrt( num ) ;

System.out.println( num + "squared is " + square ) ;

System.out.println( num + " cubed is " + cube ) ;

System.out.println( "Square root of " +num+" is " + sqrt ) ;

}

}