Must you define a data type when declaring a variable in JavaScript?

Question

No, you can define variables in javascript like `var myVariable` — kalenpw, Feb 26 '17 at 04:25
to say "you can" suggests there's another option - there isn't ... variables are untyped — Jaromanda X, Feb 26 '17 at 04:31
@jaromandaX Good point, you MUST declare variables with the var keyword, but is now too late to edit my comment — kalenpw, Feb 26 '17 at 04:33
of course, there's var, let and const now :p and not using any of those is equivalent to window.xxx (in a browser) — Jaromanda X, Feb 26 '17 at 04:34

score 0 · Answer 1 · answered Feb 26 '17 at 04:25

0

No, you ca go with just

var x = 5;

The interpreter would guess what type the var is.

answered Feb 26 '17 at 04:25

Terminus

score 0 · Answer 2 · answered Feb 26 '17 at 04:26

0

No. Javascript is not strongly typed.

answered Feb 26 '17 at 04:26

sbartell

score 0 · Answer 3 · answered Feb 26 '17 at 04:27

0

No, in Javascript variables are defined by simply using the var keyword followed by your variable name.

Example

var intVariable = 3;

var stringVariable = "Dog";

You can read more about javascript variables here

answered Feb 26 '17 at 04:27

kalenpw

3 Answers3