Square root is not working...

Question

I wrote a simple program to derermine the square root of a number, but its not working: Heres the code:
class root{
     static public void main(String[] args){
          int square = Math.sqrt[4];
          System.out.println("the square root is " + square);
}I get this error mesage when running:
C:\java_apps>javac root.java
root.java:3: cannot find symbol
symbol : variable sqrt
location: class java.lang.Math
int square = Math.sqrt[4];
^ (arrow points to dot after "Math")
1 error
Thanks!
Jake

Answer 1

Math.sqrt() is a method, so you have to invoke it with parentheses:int square = Math.sqrt(4);
> root.java:3: cannot find symbol
symbol : variable sqrt
location: class java.lang.Math
int square = Math.sqrt[4];
^ (arrow points to dot after "Math")Because of the square bracket the compiler is looking for an array sqrt inthe Math class. It can't find one and so you get the message.
(Note that the Math static methods tend to return double not int, so you will have to
deal with that as well.)