Example of an Javascript closure

closure2.js

function outside(x) {
  function inside(y) {
    return x + y;
  }
  return inside;
}
fn_inside = outside(3); // Think of it like: give me a function that 
                        // adds 3 to whatever you give it
result = fn_inside(5); // returns 8

result1 = outside(3)(5); // returns 8