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Could someone help me understand the input() function? (lemmy.blahaj.zone)

submitted 5 months ago by [email protected] to c/[email protected]

34 comments fedilink hide all child comments

I'm currently learning Python and am learning about very basic functions such as int(), float(), and input().

I have the first two down pat, but I'm struggling to understand the last. The example I'm looking at is found at 12:26 of this video:

nam = input('Who are you? ')
print('Welcome', nam)

Who are you? Chuck
Welcome Chuck

In this case, wouldn't nam be a variable equal to the text on the right side of the = sign?

In which case, if nam is equal to input('Who are you? '), then wouldn't print('Welcome', nam) just result in

Welcome input(Who are you? )?

Obviously not (nor does it work in a compiler), which leads me to believe I'm clearly misunderstanding something. But I've rewatched that section of the video several times, and looked it up elsewhere on the web, and I just can't wrap my head around it.

Could someone help me with this?

Thanks.

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[–] [email protected] 1 points 5 months ago* (last edited 5 months ago) (1 children)

user_number = int(input(‘what’s the number?’))

But then what's input('what's the number?') result in? I understand int() and float(), but I can't wrap my head around what exactly input does to the text within the succeeding parentheses.

Edit: I get it now! Another user helped me understand it, and I get it now! Thank you for your help too! You're awesome!

[–] [email protected] 2 points 5 months ago (1 children)

Yup. You'll see functions wrapped inside other functions all the time. The function on the inside will run first, then the next, etc.

In the example I gave, the value of nam is a string. But it you need to perform some mathematical function to it, it needs to be interpreted as a number. So once the value is received, int() will convert it into a number. Finally, that final value will be assigned to nam. Wrapping functions inside of functions is a great way to write concise code.

[–] [email protected] 1 points 4 months ago

That's pretty cool. It's almost like a...time-based Excel function! Lol.