javascript function types

functions.js

// self invoking
(function () {
    var x = "Hello!!";      // I will invoke myself
})();

// functions as values
function myFunction(a, b) {
    return a * b;
}
var x = myFunction(4, 3);

// functions as objects
function myFunction(a, b) {
    return a * b;
}
var txt = myFunction.toString();