What is variables javascript

• Variables are containers that store information for later use.

• Let's create our first variable:

    let test;
  

We use the let keyword to declare a variable with the name test.

• But, what happens if we use console.log() to log our new variable?

    let test;
    console.log(test);
  

• The console prints undefined. This is because we have not initialized our variable. Initializing a variable is the process of assigning a value to it.

• We can assign a value to a variable with the assignment operator =

    let test;
    test = 1;
    console.log(test);
  

  • You can also assign a value to a variable directly when you create it.

    let test = 1;
    console.log(test);

• You can also create a variable with the const keyword.

• The difference between the two is that you can not assign a new value to a variable that was created with const.

    const test = 1;
    test = 2;
  

• we attempt to assign a new value to a variable that was created with const.

• It throws an error.

• You also cannot declare a const variable without assigning a value to it directly.

    const test;