Answer 1

aazizul zainal ,

you have just started with python tutorial (8%), so you should follow the learning path and continue step by step.

anyway, here are some sources from sololearn about functions in python:

https://www.sololearn.com/learn/Python/2285/?ref=app
https://www.sololearn.com/learn/Python/2286/?ref=app
https://www.sololearn.com/learn/Python/2484/?ref=app
https://www.sololearn.com/learn/Python/2437/?ref=app