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In JavaScript, it's important to understand and properly use these keywords to write effective and functional code. Misusing them or misunderstanding their functionalities can lead to errors or unexpected behavior in your programs.$13.00
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In JavaScript, it's important to understand and properly use these keywords to write effective and functional code. Misusing them or misunderstanding their functionalities can lead to errors or unexpected behavior in your programs.
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Course
Nano Technology
Institution
Dhanalakshmi College Of Engineering
They cannot be used as identifiers (such as variable names or function names) because they are part of the language syntax. Some common keywords in JavaScript include "var", "let", "const" for variable declaration, "function" for defining functions, "if", "else", "switch", "case", "default" for con...
Including JavaScript in an HTML Page
<script type="text/javascript">
//JS code goes here
</script>
Call an External JavaScript File
<script src="myscript.js"></script><code></code>
Including Comments
//
Single line comments
/* comment here */
Multi-line comments
Variables
var, const, let
var
The most common variable. Can be reassigned but only accessed within a function. Variables
defined with var move to the top when code is executed.
const
Cannot be reassigned and not accessible before they appear within the code.
let
Similar to const, however, let variable can be reassigned but not re-declared.
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