All Wiki Articles Create Wiki Article

Welcome to Dirask IT community! ❤ 💻
We are community of people that helps each other.

If you are beginner in IT field, you are more then welcome to ask questions, it will help you to learn faster. We are here to help you.

We are always beginner in something, we just need to remember it along the way.

there are no wrong questions - Ask Question

JavaScript - what is the difference between let and var?

0 contributions

1 points

1. Main differences between `let` and `var` keywords are:

let keyword varialbes do not have varialble hoisting.
variable hoisting is shifting varialbe declarations to top of source code making them accessible above.

Example 1:

<!doctype html>
<html>
<body>
  <script>

    'use strict';

    a = 2; // variable hosting allows for assigning before declaration
    console.log(a);

    var a;

  </script>
</body>
</html>

Output:

Example 2:

<!doctype html>
<html>
<body>
  <script>

    'use strict';

    var a = 2;
    console.log(a);

  </script>
</body>
</html>

Output:

let keyword varialbes can be created in different scopes:

	`let` keyword variables	`var` keyword variables
global scope	yes	yes
function scope	yes	yes
curly braces scope	yes	no

2. Tips

ALWAYS use let keyword.

JavaScript - what is the difference between let and var?

1. Main differences between `let` and `var` keywords are:

2. Tips

See also

Checkout latest Findings & News:

Checkout latest questions:

Checkout latest wiki articles:

1. Main differences between let and var keywords are:

2. Tips

See also

Checkout latest Findings & News:

Checkout latest questions:

Checkout latest wiki articles:

1. Main differences between `let` and `var` keywords are: