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Re: Values of statements

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  Re: Values of statements "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-02-05 10:39 +0100

#32470 — Re: Values of statements

ram@zedat.fu-berlin.de (Stefan Ram) wrote on 05 Feb 2017 in 
comp.lang.javascript:

> In JavaScript, statements have values.

No, that's too bold a statement!

There is a difference between functions and statements.

Even functions do not 'have' a value, but 'return' a value.

Statements do NOT return a value, 
EXCEPT when a function is used as a statement, as
then it returns a value that is immediately discarded.

alert('hi'); // Statement, no return vanue.

let z = add(2,3); // function [user defined here]

add(2,3); // same function now used as a statement

let z = alert('hi'); // returns 'undefined', for lack of returning a value
alert(z);

-- 
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)

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