js

JS Basics

JavaScript is a scripting language that enables you to create dynamically updating content, control multimedia, animate images, and pretty much everything else.

Data Types

Primitive values:

• Undefined: A variable that has not been assigned a value has the value undefined.
• Null: The value of null represents the intentional absence of any object value.
• Boolean: Logical entity that can have two values, true or false.
• Number: Number values.
• BigInt: Used for storing and operating on big integers even beyond the safe integer limit for numbers.
• String: Used to represent textual data. The first element is at index 0, the next at index 1, and so on. The length of a string is the number of elements in it.
• Symbol: A symbol is a unique and immutable primitive value and may be used as the key of an Object property.