Python 3 Programming Tutorial - Functions

The idea of a function is to assign a set of code, and possibly variables, known as parameters, to a single bit of text. You can think of it a lot like why you choose to write and save a program, rather than writing out the entire program every time you want to execute it.

To begin a function, the keyword 'def' is used to notify python of the impending function definition, which is what def stands for. From there, you type out the name you want to call your function. It is important to choose a unique name, and also one that wont conflict with any other functions you might be using. For example, you wouldn't want to go calling your function print.

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[hammadmk]

The sound his keystrokes make are just so soothing.

[--Valek--]

Thank you for keeping it terse, brief, and not having an obnoxious intro and outro. 10 out of 10

[kaboyomichael]

after struggling for almost an hour with seeing results, with a 4 mins explanation, I have finally got it!

[cubebrothersbn]

Really great video, brother!
I was having problems in understanding the function module of python... But now I got the basics...
Again thanks

[heniekhenkowski]

Soo i thought it's difficult until i saw your video. You made it easy for me! Thanks!

[andrewwilliams]

This was huge. I am trying to learn Python on SoloLearn and I couldn't figure out why my projects were all coming back blank. thanks so much. I tried the function () like you did at the end of my code and it didn't work until I added the arguments inside again. Not sure why your string worked without the arguments and mine didn't but either way thanks again!

[benferree]

Love the short videos keep up the great work

[wktodd]

Is there a way to call a function reference held in a list/dictionary?. i.e. can i store a list of functions/ methods in a list (they are, after all, just references) then call them in sequence or indexed from the list.

[hassankamal]

Your videos are so so so so HELPFUL :) You making coding easy

[dishydez]

Very simple to follow. Thanks a lot man!

[Johnt]

I am doing these exercise on Jupyter Notebook. When I enter a "def" function, it does not give me an outcome. my code was:def example():        print ('the')example()I get no errors but I also get no outcome, as in "the" does not print. Is there something I need to adjust in jupyter notebook? I enter the same code in spyder and I get "the" to print out. Please help & Thank you

[fatmandoubblescoop]

print('Your videos are so helpful')
print('I think i love you??')

[plop]

can i get a link to this python. i had to download visual studios and i hate it

[shantkalaidjian]

Perfect videos we are using them in our school ;)

[jerryhuang]

cover all the necessary detail, thanks so much.

[roshanshah]

This was a helpful video to understand functions, after looking for few videos i found this good. Will check other videos too. I am beginner in programming, will iy be easy to get good hold on it ??

[subhadeepdas]

Why we don't asign a data type to a variable in python

[GamingMasterAnthony]

Every time I try it says string is not callable

[lisaolbert]

Thank you very much for that series of educational videos

[ArunKumar-wvqo]

Hi Sentdex,

I want to watch your first video tutorial. I searched down but didnt please send me a link of the first tutorial. M ew to python I hope you will understand.