TypeScript Tutorial #8 - Function Basics

Hey gang, in this TypeScript tutorial we'll talk more about Functions, optional arguments & return types.

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[aerial_silks_sierra]

I never thought that typescript would be so easy to learn if you have some understanding of JavaScript and the concept of compiled languages. I'd been putting it off but I'm so glad I found this. You explain everything so well - it's so thorough. I find that most videos forget to explain reasons and differences in syntax changes - this is a point that drives me crazy about switching between languages - it gets overlooked so often (at least it was in my training)😅

[cedrics]

The reason you sometimes have to explicitly mention the return type is when you assign the return value to a variable which is supposed to have a certain type. Typescript can then check if you are assigning a valid return type to your variable.

[Shakeel]

Thank you so much Shaun Pelling. You are a doing great contribution to web dev community around the globe.

[nidhi]

This is the most sort series on type script. thankyou so much!!

[alexandr]

very useful series! can't wait for more advanced lessons =)

[alimirhashimli]

I realized that when you a tell that both of the parameters must be number (a: number, b: number), and you assign a string (for example, add(6, "abc")), there was no error but the result will be joining of both arguments (6abc).

[vivekyadav]

great explained in simple langauge ....love from India 🥰

[marcinkalmar]

This tutorial is really good to watching, you can enjoy your learning and understand everything clearly ;)

[rorygrignard]

Thank you Master Splinter (AKA: Ninja Shaun) 🧙‍♂

[brillrayel]

add will still be Function 7:49 but the return is void?

[EnglishRain]

At 5:00, iirc Python requires default parameters first right? So that's reversed in TS/JS I guess.

[amanpreetsinghbawa]

BTW who's that one disliker.
Great work Ninja

[ayazrzayev]

I guess something changed since the recording of the video as this code works fine
add = (a: number, b: number, c: number) =>
{
return a + b + c
}

let result = add(3, 3, 4)

result = 'hey'

[arturmostowiak]

"Void is a complete lack of any kind of value" - I dare to disagree since function can return undefined, or null. Your description matches the "never" keyword

[absm]

Good morning net ninja I Haven question: in real work are we really use this(a:number, b:number |string) really man are we, please man you must teach us real one, could you please 😊😅😅

[upcomng]

Is there any purpose first function was define by "let" and second function define by "const"

[ajazmiah]

how do i get my visual studio to look like this, mine looks so cramped and no so clean