Functions concept is a bit confusing how can they be used as arguments of other functions.

Answer 1

https://www.sololearn.com/learn/JUMP_LINK__&&__Python__&&__JUMP_LINK/2437/

Answer 2

If they return something (integer, string,...) they can be handled like a variable which value is dependent on the algorithm of it.

int func1(){
return 5;
}
now func1() could be used as an integer with value 5

Answer 3

thank you