Jun 10, 2017 · When a return is encountered in a function. It will return to the point immediately after the code that called the function. If nothing is specified after the return statement, that is all that happens. However if a literal is returned like 2 or 3,etc, a literal is returned. You can also return a Boolean "true/false ", a string, or a variable.

Jun 27, 2013 · So to recap: No, a JS function needn't return anything as far as your code goes. But as far as the JS engines are concerned: a function always returns something, be it explicitly via a return statement, or implicitly. If a function returns …

return statement: The return statement exits the function and replaces the function call (i.e. where the function was invoked) with the value after it. Note: JavaScript returns undefined by default when a function doesn't return any other value. so: function a() { alert('A'); } == function a() { alert('A'); return undefined; } thus:

Jul 30, 2012 · LINK: Try-catch-finally-return clarification. Return Statement definition as per: Java Docs: a return statement can be used to branch out of a control flow block and exit the method. MSDN Documentation: The return statement terminates the execution of a function and returns control to the calling function. Execution resumes in the calling ...

Jun 2, 2013 · return is used to send a value back to where's it's called from. You use it if you want to return a value. If you don't have a return statement, it's the same as return undefined. console.log returns undefined, so return console.log(text) returns undefined. So, only return if you want to get a value from the function.

May 4, 2011 · JavaScript provides for passing one value back to the code that called it after everything in the function that needs to run has finished running. JavaScript passes a value from a function back to the code that called it by using the return statement. The value to be returned is specified in the return keyword.

Mar 19, 2019 · As far as I know, the finally block always executes, irrespective of whether you have a return statement inside try or not. Ergo, you get the value returned by the return statement inside finally block. I tested this with Firefox 3.6.10 and Chrome 6.0.472.63 both in Ubuntu. It is possible that this code may behave differently in other browsers.

Apr 17, 2020 · An expression in return statement — 1, 2, 3 — is nothing but a comma operator applied to numeric literals (1, 2, and 3) sequentially, which eventually evaluates to the value of its last expression — 3.

Dec 5, 2015 · @RonRoyston - First off, the function you pass to .then() is a separate function from the containing function so when it is called, it has its own return value. Secondly, the return value from a .then() handler becomes the resolved value of the promise. So, .then(val => {return 2*val;}) is changing the resolved value from val to 2*val. –

I discovered that it's possible to use a return statement to exit the current JS script, but only for older-style CommonJS scripts that use the require(x) syntax. Once you switch to the newer import x from y module syntax, using the return statement produces SyntaxError: Illegal return statement.