JavaScript Operators

Operators are special symbols that perform operations on operands (values and variables). They are used to manipulate data and perform calculations.

Types of Operators

Commonly used operators in JavaScript include:

• Arithmetic Operators: +, -, *, /, %, ++, --
• Assignment Operators: =, +=, -=, *=, /=, %=
• Comparison Operators: ==, ===, !=, !==, >, <,>=, <=< /li>
• Logical Operators: && (AND), || (OR), ! (NOT)
• String Operators: + (concatenation), += (concatenation assignment)
• Ternary Operator: condition ? expr1 : expr2
• Type Operators: typeof, instanceof

Examples

Arithmetic Operators

These operators are used to perform mathematical calculations.

let a = 10;
let b = 5;
let sum = a + b; // 15
let difference = a - b; // 5
let product = a * b; // 50
let quotient = a / b; // 2
let remainder = a % b; // 0
a++; // 11
b--; // 4

Assignment Operators

These operators are used to assign values to variables.

let x = 10;
x += 5; // 15
x -= 3; // 12
x *= 2; // 24
x /= 4; // 6
x %= 4; // 2

Comparison Operators

These operators are used to compare two values and return a boolean result.

let p = 10;
let q = '10';
console.log(p == q); // true (value comparison)
console.log(p === q); // false (value and type comparison)
console.log(p != q); // false
console.log(p !== q); // true
console.log(p > 5); // true
console.log(p < 15); // true
console.log(p >= 10); // true
console.log(p <= 10); // true

Logical Operators

These operators are used to combine multiple boolean expressions.

let isAdult = true;
let hasID = false;
console.log(isAdult && hasID); // false
console.log(isAdult || hasID); // true
console.log(!isAdult); // false

String Operators

These operators are used to manipulate strings.

let firstName = "Ayush";
let lastName = "Narware";
let fullName = firstName + " " + lastName; // "Ayush Narware"
firstName += " Gyan"; // "Ayush Smith"

Ternary Operator

This operator is a shorthand for an if-else statement.

let age = 18;
let canVote = (age >= 18) ? "Yes" : "No"; // "Yes"

Type Operators

These operators are used to check the type of a variable or object.

let num = 42;
console.log(typeof num); // "number"
let str = "Hello";
console.log(typeof str); // "string"
let arr = [1, 2, 3];
console.log(arr instanceof Array); // true

Understanding and using operators effectively is crucial for performing various operations in JavaScript programming.

For more details, you can refer to the MDN Web Docs on Expressions and Operators.