Hello Coffee Script

hello.coffee

number = 42
sqr = (x) -> x*x
x = sqr number
alert x

hello.js

(function() {
  var number, sqr, x;
  number = 42;
  sqr = function(x) {
    return x * x;
  };
  x = sqr(number);
  alert(x);
}).call(this);