Functions in Javascript | Javascript Functions Tutorial

In this video we'll look at examples of Functions in Javascript and learn how to create our own functions that are blocks of reusable code!

✅ Quick Concepts outline:
Functions in Javascript
(00:00) Intro
(0:15) Built-in Functions
(0:55) Functions are reusable code blocks
(1:12) Function Declaration Syntax
(1:20) Creating a Basic Function: sum()
(2:09) Calling a Function into action
(2:50) Passing Parameters to a Function
(3:30) Creating Reusable Code with Functions
(3:50) Missing Parameters
(4:30) Handling Missing Parameters
(5:20) Another Function Example: getUserNameFromEmail()
(7:10) Is it reusable? Yes!
(7:30) Anonymous Functions
(8:30) Arrow Functions
(9:05) Creating One More Function: toProperCase()

📚 Further Reading:
MDN Web Docs:
Eloquent JavaScript Chapter 3:

📺 More Beginner JS Videos:

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#Functions #Javascript #Tutorial

[reked]

I love how you give a simple example and then a practical example that you would use in a real life scenario. So many tutorials don't do this... thank you so much

[alan-overthenet]

Really good explanation and useful examples. Thank you, Dave

[StellaOloo]

Best explanation ever on functions ever!!! Thank you Dave Gray.

[akshayasalaskar]

Thank you for such a simple explanation!!!!

[fazzyakamello]

I’m so glad I bumped into your channel. Thanks to Traversty Media! Keep it up

[srinivasaraoyp]

Very interesting and very important topic, thank you very much Dave.

[Cascadia]

Excellent explanation and a great teaching voice! Thank you 😊

[Grihlo]

Your method of explanation is just the best! No water, only essential useful and practical information. Thank you!
I wonder why is it preferrable to define functions with 'const' instead of 'let'?

[omcinc]

Thanks for the great JavaScript series! I notice as you're typing JS code, you have a pop-up helper showing you a description of the method and parameters it accepts... What is this extension please?

[jiweihe]

Thanks for these helpful videos. Is "return" usually removed from arrow functions? 11:30

[B-Billy]

Thanks for the video, however, are not the latter two "Fucntion Expression"?

[aetherwebdev]

I'd say it's a Good Explanation.

But, aren't Methods Functions that are attached to a Class or An Object.