Do I have to return something in javascript function?
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.
No; Javascript functions are not required to return a value.
If you call a function that doesn't return a value, you'll get undefined as the return value.
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):
