Do I have to return something in javascript function?

Question

In JavaScript functions, do I need to return something (true or false) ? So far, all the functions I wrote without returning anything work just fine. I\'m just curious.

Answer 1

no you dont. I believe if you do

var result = iAmADefinedFunctionThatDoesntReturnAnything();

result will be undefined.

Edit, this screenshot should be illuminating (forgive the mistake when i fail to invoke f):