javascript closure immediate evaluation [duplicate]

Answer 1

var iterate = (function () {
    var i, j = [];
    for (i = 0; i < 3; i += 1) {
        j.push(i);
        alert(j[j.length - 1]);
    }
}());

You don't need closure to merely output a value. Your code should, however, be contained in a function for object-oriented containment. Functions don't have to be called to be executed.