How do you use a class without a object

Question

how do i use a class withouth making it a object for example like the math class. i can just do math.sqrt() and i dont have to make a object like Math mymath;

Answer 1

Firstly.. Js Math is an object, as everything in js is, there are no classes in js.
Just for clarification.

About your question there are different solutions in c++
The first is namespaces..
std::sqrt(arg) defined in header <cmath>

Second.. as ⚒️Raj Chhatrala🛡️ said you can have static methods.
Although in this case is preferable use namespaces ( in js you have to use workarounds to do it ).

You also have Template Meta Programming in c++, but it's complicated.

I think the real problem is that they are two really different languages, and compare them is not really helpful,
Just keep in mind they have different paradigms at a base level, so I suggest to make some researches about paradigm and then start to think and use the language in a proper way.
With that in mind everything becomes natural.

It's not easy at first stage, especially if you compare c++ and js

Answer 2

Absolutely wrong !

Answer 3

I think it is not possible in C++.
You can access like this in JavaScript.

In C++ you have to create a object.
Although you can call/invoke a static method without creating instance of class.

Answer 4

AZTECCO but i dont compare c++ to js, math is a library in c++

Answer 5

⚒️Raj Chhatrala🛡️ thank you

Answer 6

AZTECCO please say what is right then

Answer 7

Good thing you don't, oh.. it is not so bad to compare them, just keep in mind what I said before.

Exactly, in js you don't have libraries, you have only objects, when you use the math object in js .. is the js way to use libraries.