When to use return, and what happens to returned data?

Question

What is the difference between:

function bla1(x){console.log(x)}

and

function bla(x){return console.log(x)}

I

Answer 1

As you already mentioned, return gives you the possibility to call a function and save its returning value.

Here is a little example:

function bla(x) { return "blablabla"; }

If I call the method I will get a string with blablabla:

var blastring = bla(x);
alert(blastring);

This would result in an alert with blablabla.