javascript: what are immediate functions used for [duplicate]

Posted by tkoomzaaskz on Stack Overflow See other posts from Stack Overflow or by tkoomzaaskz
Published on 2013-06-20T11:34:05Z Indexed on 2013/06/27 10:21 UTC
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This question already has an answer here:

Why using self executing function in JavaScript? [duplicate] 4 answers

I've been programming in JS since some time, but I have never came upon a need of using immediate functions, for example:

(function(){
    console.log('hello, I am an immediate function');
}())

What would be the difference if I just wrote:

console.log('hello, I am an immediate function');

? I don't have any access to this function anyway (it is not assigned anywhere). I think (but I'm not sure) that I can implement everything without immediate functions - so why do people use it?

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