If conditions

Question

Hy guys, I just wanted to ask why I can't use the If statement like this:
if a == "Hello" or "Good morning" or ... :
Instead of it I have to write:
if a == "Hello" or a == "Good morning" or a == ... :
Do u know any shorter ways to do the same?

Answer 1

Wait, there is a way!

What you can ask for (in Python at least) is this:

if a in ('Hello', 'Good Morning'):
...

Like this you ask if a's value is one of the elements of that tuple.

Answer 2

Everything that evaluates as True is already a complete condition.

'Good Morning' (since it is no empty string) is True, so if you write like you said, it actually means this:

if a=='Hello' or ('Good Morning' evaluates as True (which it does))...

You see the issue?

So you have to write a=='Good Morning', because that's what you want to check.

Answer 3

No, not really - your interpreter needs it this dumb. ;'D

If you wrote a==(b or c), it would again mean something different.

Answer 4

Hi! I always asked the same question, thinking that somehow it'll be like maths, Bool's Algebra, it goes like this:
if a == ("Hello" or "Good morning" or ...)
But unfortunately, that doesn't work, so you can write them all in one line or just divide them into different elif statements.

Answer 5

do u know any shorter variants?

Answer 6

Ok, thank u guys!!

Answer 7

woow!!!

Answer 8

Thanks

Answer 9

Genius!

Answer 10

Array is the key

Answer 11

:) Anytime!