How does this command don't work and how exactly it works i didn't really get it

Question

The command is:

Var x = 10;

This is the first command 👆🏻

Var x = 100;
document.write(x);

The 2nd command 👆🏻

Var x = 100;
document.write(x);

X = 42;
document.write (x);

The last command 👆🏻

All of them I didn't get it and doesn't work to see what they do any information?
I will be really grateful for information!

Answer 1

xxtheblade 3

Learn lesson 3.1 Variables in JavaScript course.

Variables are containers for storing data values. The value of a variable can change throughout the program.

Answer 2

Please tag the appropriate programming language.

Answer 3

xxtheblade 3

What are you doing?

That is JavaScript code

document.write is a function which is used to print value on browser.

x is a variable with different values

Did you try to do in web code?

Answer 4

justice it's JavaScript

Answer 5

Your mom what does the variables does i don't have any idea?