Factorial in JavaScript | Easy Explanation with Recursion & Loop (Beginner Friendly)

Описание: Learn Factorial in JavaScript step-by-step!
Is video me hum 3 tarike se factorial calculate karna sikhenge — loop, recursion, aur ES6 one-liner.
Interview me yeh question bahut common hota hai, isliye concept clear hona zaroori hai sir.

🔥 What you will learn

What is Factorial? (simple explanation)

Factorial using for loop

Factorial using recursion

ES6 one-liner method

Edge cases: 0!, negative numbers

Interview tips + complexity