“JavaScript is a versatile, high-level programming language that is commonly used to create interactive effects within web browsers. ”

Variables

Variables are used to store data values. In JavaScript, you can declare a variable using var, let, or const.

var name = 'John';
let age = 25;
const isStudent = true;

Data Types

JavaScript supports various data types, including:

• String: "Hello, world!"
• Number: 42
• Boolean: true or false
• Object: { name: 'John', age: 25 }
• Array: [1, 2, 3, 4, 5]
• Undefined: A variable that has been declared but not assigned a value
• Null: Represents the intentional absence of any object value

Operators

JavaScript includes various operators:

• Arithmetic Operators: +, , , /, %
• Assignment Operators: =, +=, =, =, /=
• Comparison Operators: ==, ===, !=, !==, >, <, >=, <=
• Logical Operators: &&, ||, !

Functions