Question

I just bought the newest version of “JavaScript: The Definitive Guide” and already have a question. 😀

Are the following lines semantically the same:

var square = function(n){
                 return n * n;
             };

and

function square(n){
    return n * n;
}

If yes, what are the advantages/disadvantages of using either of them?

Thanks for your help!

Answer 1

Check this out:

a(); // prints 'A'

function a(){

    console.log('A');

};

and this:

b(); // throws error. b is not a function

var b = function() {

    console.log('B');

};

Did you notice the difference?