Do you need to declare variable data type in js?

Question

This question was in challenge and answer was "no".
WHY???
If you wont define a type you cant use it...

Edit:
Oh I was cheated,
I do not use it, so it do not have to be declared!

Answer 1

JavaScript is a loosely typed language, meaning you don't have to declare the data type when declaring a variable, as you might with other languages. A variable can hold any type of data without being specified.

Here's an article you might find useful that goes into more detail:

https://medium.com/@xiaoyunyang/javascript-is-a-loosely-typed-language-meaning-you-dont-have-to-specify-what-type-of-information-137408d54fc7

Answer 2

I think they use the term dynamically typed for languages where you don't have to declare the variable type.

Answer 3

Variable are dynamically allocated. So there are no data types such as Float, Double etc but in js there is string, number, Boolean.
To declare a variable you just use the keyword var or let and the program will decipher if the value is a string or number or boolean on its own.

Answer 4

No, you don't need to declare variable type in js, it's dynamically determined.

Answer 5

No but in emascript 6 I wonder where using the keyword Const is not geering towards that?... after second thought, it's something different, const is not a data type as such.

Answer 6

No, js can detect the data type itself

Answer 7

There is no data type

Answer 8

хуй знает

Answer 9

variable in js can contain any data type. there is no need to declare them