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🔧 Topic 05: Functions — "Code Ka Kaam Baant Do!"

"Functions are the bread and butter of JavaScript programming." "Socho factory me ek machine hai —…

Overview

🔧 Topic 05: Functions — "Code Ka Kaam Baant Do!" — Quick Facts

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Previous: Index

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[← Topic 04: Control Flow](./04_JS_ControlFlow.md): 📚 Course Index

Topic 1

📌 Is Topic Me Kya Hai?

📚 Function declaration, expression, arrow functions, parameters & arguments, default…

Topic 2

📦 Function Declaration — Classic Way!

💡 `javascript // Function DECLARATION (most basic!): // SYNTAX: function name(parameters) {…

Topic 3

📤 return — Value Wapas Do!

🎯 `javascript // return = function se value BAHAR bhejo! // console.log sirf PRINT karta…

Topic 4

🎯 Default Parameters (ES6!)

⭐ `javascript // Default value = agar argument nahi diya → default use! function greet(name…

Topic 5

... Rest Parameters (ES6!)

🔑 `javascript // ...rest = UNLIMITED arguments ek ARRAY me! function sum(...numbers) { let…

Topic 6

📝 Function Expression — Variable Me Function!

✨ `javascript // Function stored in a VARIABLE! const greet = function(name) { return…

Topic 7

➡️ Arrow Functions (ES6!) — Short & Sweet!

🌟 `javascript // Arrow function = shorter syntax! => (fat arrow!) // REGULAR function:…

Topic 8

🌍 Scope — Variable Kahan Visible?

🚀 `javascript // GLOBAL SCOPE — Har jagah accessible! let globalVar = "I'm global!";…

Topic 9

🔒 Closures — Function Remembers!

📚 `javascript // Closure = Inner function REMEMBERS outer function's variables! // Even…

Topic 10

📞 Callbacks — Function As Argument!

💡 `javascript // Callback = function jo dusre function ko ARGUMENT me do! // "Main kaam…

Topic 11

🏗️ IIFE — Immediately Invoked!

🎯 `javascript // IIFE = Define + Call IN ONE STEP! // (function() { ... })(); (function() {…

Topic 12

🎩 Higher-Order Functions

⭐ `javascript // Higher-Order Function = function jo: // 1. Function as ARGUMENT le OR //…

Topic 13

🔑 KEY POINTS — Top 10 Takeaways!

🔑 ` ┌─────────────────────────────────────────────────────────┐ │ │ │ 🔑 KEY POINTS │ │ │ │…

Topic 14

💪 Exercises — Khud Karo, Khud Seekho!

✨ Exercise 1: Basic Functions 🧱 `javascript // 1. Function banao: 2 numbers ka maximum…

Topic 15

🗺️ Navigation

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Quick Quiz

Quiz — Question 1

🔧 Topic 05: Functions — "Code Ka Kaam Baant Do!" ka sabse sahi definition kya hai?

Complete! 🎉

🔧 Topic 05: Functions — "Code Ka Kaam Baant Do!" Complete!

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