JavaScript Full Course Bootcamp Day 5 | Functions in JavaScript Explained (Beginner to Advanced)

Welcome to Day-5 of the JavaScript Full Course Bootcamp! 🚀
Today’s lesson is one of the most important topics in JavaScript Functions.

📌 What You Will Learn in Day-5:
✔ What are functions & why we use them
✔ Function Declaration vs Function Expression
✔ Arrow Functions explained with examples
✔ return keyword — how it really works
✔ Hoisting in function declaration vs expression
✔ IIFE (Immediately Invoked Function Expression)
✔ Parameters vs Arguments
✔ Default Parameters & Rest Parameters
✔ Pass by Value vs Pass by Reference
✔ Pure vs Impure Functions
✔ Local Scope vs Global Scope in functions

These concepts are must-know for:
👉 Writing clean & reusable code
👉 Understanding advanced JavaScript
👉 Interviews & real-world projects
👉 Frameworks like React & Node.js

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