Rust Programming Tutorial #13 - Functions

In this video I go over how you can write and use your own functions using Rust - we look at passing in values and also functions that return data.

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[drizerreal]

I split my screen in one part this video and the other part the interactive Rust playground, so I'm coding along with the video. And that works great for me.
So I just wanna give a shout out to the person who made these videos: Great for learning and helps me tremendously. Thanks dude!

[kiraPhk]

I knew Rust can return values, but I've never seen people use the return keyword.

They always just do something like this:

fn is_even(n: u32) -> book { n % 2 == 0 }

Leaving off the return keyword as well as the semicolon for the final and returned expression.

[faller]

I dont know the 2017 version how was it.

But now you can omit the return, and the last line achivable will be the return statment

[arcticspacefox]

I love your rust videos, why did you stop doin rust?

[samdavepollard]

just to add, in case it's not covered elsewhere in your excellent videos, can also do stuff like this:
fn main() {
print_numbers_to(20);
}

fn print_numbers_to(limit:u32){
for n in 1..=limit{
println!("{} is {}", n, if n%2==0{"even"}else{"odd"});
}
}

[the_real_editor]

The functions are sorta like Go. You hove to specify the type of data you are passing.

[NouifrUIwefdf]

"for n in 1..num" will print 1 to 9, if you want 1 to 10 "for n in 1..=num" (or of course 1..num+1 )

[Footballistaas]

how to use magic_number() function to generate unsigned values (0 or 1)

[adiyatmubarak]

Hi, I'm on learning rust right now and watching this video to find some practical examples.
I thought println! on line, 8 will error because the ownership is transferred to is_even function on line 7


But it didn't :|

[Romancrabf]

it shall work without "return", it is not necessary element

[oaw_manofnorse]

Actually, if a function has the name print_number_to, then the last number has to be included, and thus it must be "for n in 1..=num"