Assign function as variable

Question

Sorry. This is a quiz on python by Sololearn. I don't understand why assigning a function to a variable calls it!
Could anyone give me an explanation?
Thanks

https://code.sololearn.com/cHnws7ACA4f1/?ref=app

Answer 1

A function basically performs a specific task (most times returning a value)

Parathenses '()' are used for calling the function and that returned value could be simply printed or even stored in a variable

PS: You could even try assigning the function to a variable without the parentheses and in this case it returns the memory-location

Answer 2

Pariket Thakur As far as I know, the expression "A===B" means nothing because the "===" operand does not exist in python! The same for "null", which doesn't exist in python (you can use "None").

Answer 3

ravilnicki so:

https://code.sololearn.com/cT4dQUYz0E8Y/?ref=app