JS Tutorial

JavaScript Operators

JavaScript operators are special symbols used to perform operations on values and variables. These operations can include arithmetic, comparison, assignment, logic, and more.

🔢 1. Arithmetic Operators

• + Addition
• - Subtraction
• * Multiplication
• / Division
• % Modulus (remainder)
• ** Exponentiation

let a = 5;
let b = 2;

console.log(a + b);  // 7
console.log(a % b);  // 1
console.log(a ** b); // 25
  

🎯 2. Assignment Operators

Used to assign values to variables.

• = Simple assignment
• +=, -=, *=, etc.

let x = 10;
x += 5; // x becomes 15
  

⚖️ 3. Comparison Operators

Used to compare two values:

• == Equal to (loose)
• === Equal to (strict)
• != Not equal
• !== Strict not equal
• >, <, >=, <=

let a = 5;
console.log(a == "5");   // true (type ignored)
console.log(a === "5");  // false (type compared)
  

🔀 4. Logical Operators

Used to combine multiple conditions:

• && AND
• || OR
• ! NOT

let isLoggedIn = true;
let isAdmin = false;

console.log(isLoggedIn && isAdmin); // false
console.log(!isAdmin);              // true
  

🚀 Try it Yourself!

Click the button below to see different operators in action:

💡 Other Important Operators

• typeof → Tells the data type
• instanceof → Checks object type
• ?? → Nullish coalescing (returns right-hand value if left is null/undefined)
• ?: → Ternary operator for quick conditionals

let name;
let display = name ?? "Guest";
console.log(display); // Guest