Performing Operations

Operators are used to perform operations on variables and values.

JavaScript has arithmetic, assignment, comparison, logical, and other operators.

// Arithmetic Operators
let sum = 10 + 5;        // 15
let diff = 10 - 5;       // 5
let product = 10 * 5;    // 50
let quotient = 10 / 5;   // 2
let remainder = 10 % 3;  // 1
let power = 2 ** 3;      // 8

// Assignment Operators
let x = 10;
x += 5;   // x = x + 5 (15)
x -= 3;   // x = x - 3 (12)
x *= 2;   // x = x * 2 (24)
x /= 4;   // x = x / 4 (6)

// Comparison Operators
10 == '10'   // true (loose equality)
10 === '10'  // false (strict equality)
10 != '5'    // true
10 !== '10'  // true
10 > 5       // true
10 < 5       // false
10 >= 10     // true

// Logical Operators
true && false  // false (AND)
true || false  // true (OR)
!true          // false (NOT)

• + - Addition
• - - Subtraction
• * - Multiplication
• / - Division
• % - Modulus (remainder)
• ** - Exponentiation
• == - Loose equality
• === - Strict equality (recommended)
• != - Not equal
• !== - Strictly not equal
• && - Logical AND
• || - Logical OR
• ! - Logical NOT

<div class="calculator">
  <input type="number" id="num1" value="10" placeholder="Number 1">
  <input type="number" id="num2" value="5" placeholder="Number 2">
  <button onclick="calculate()">Calculate</button>
  <div id="results"></div>
</div>