Welcome to Episode 4 of our JavaScript for Beginners series! 🚀
In this video, we’ll explore different types of functions in JavaScript and understand how they work with live coding examples. Functions are an essential part of JavaScript, making code reusable, modular, and efficient.
What’s Covered in This Video:
👉 What are Functions in JavaScript?
Functions are reusable blocks of code used to perform specific tasks.
JavaScript provides built-in functions such as setTimeout, alert, parseInt, and console.log.
👉 Types of Functions in JavaScript:
1️⃣ Function Declaration (Named Function)
A traditional way to define functions, using a name to refer to them.
2️⃣ Function Expression
A function stored inside a variable, useful for dynamic function assignment.
3️⃣ Arrow Function
A modern, concise way to write functions using arrow notation, often used in shorter function definitions.
4️⃣ Anonymous Function
A function without a name, commonly used inside other functions like callbacks.
5️⃣ Immediately Invoked Function Expression (IIFE)
A function that executes immediately after being defined, often used to avoid polluting the global scope.
👉 Important Notes on Functions:
Functions help avoid repetition and improve code structure.
Functions can take inputs as parameters and return values.
Arrow functions behave differently than regular functions, especially regarding the this keyword.
Resources:
👉 Download the notes here: drive.google.com/drive/folders/1CgpBEyju4f37l7HO3jdFv-43ayRjfp45?usp=sharing
👉 Subscribe to the playlist: th-cam.com/play/PLNe49bYnHr7-BmJxqnkF5Ou3yQFfH7XD9.html&si=D5W9q_OHGBP0PFSZ
Why Watch This Video?
By the end of this tutorial, you’ll have a strong understanding of functions in JavaScript, how they work, and when to use each type.
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Timestamps for Easy Navigation:
0:00 - Introduction to Functions in JavaScript
1:00 - What are Functions? Definition & Importance
2:01 - Why Use Functions? Reusability & Modularity (Example: Robot Analogy)
3:18 - Function Declaration (Named Function) - Basic Syntax
6:09 - Calling Functions Inside Other Functions (Example: Head & Hand Functions)
7:51 - Types of Functions in JavaScript:
8:18 - Named Functions
9:10 - Function Expression
11:34 - Return Statement in Functions
13:50 - Arrow Functions - Shorter Syntax
22:14 - Immediately Invoked Function Expressions (IIFE)
25:08 - Anonymous Functions (Used Inside Other Functions)
28:00 - Built-in Functions in JavaScript (Examples)
setTimeout(), alert(), parseInt(), console.log()
29:48 - parseInt() - Converting Strings to Numbers
31:13 - Recap & Key Takeaways
Functions avoid repetition in code
Arrow functions don’t support this keyword
Functions can be used inside objects & events
32:26 - Closing Remarks - More JavaScript concepts coming soon! 🚀