Q:

Why it doesn't return anything?

when i run the program it doesn't return the values True or False. Why that happens?
def esvocal(letter):
vocal = "a","e","i","o","u"
vocalup = "A","E","I","O","U" 

if letter == vocal and letter == vocalup:
    return True
else:
    return False 
esvocal("s")
esvocal("a")

A:

def esvocal(letter):
    vocal =[ "a","e","i","o","u"]
    vocalup = ["A","E","I","O","U"]

    if letter in vocal and letter in vocalup:
        return True
    else:
        return False 
esvocal("s")
esvocal("a")

Python really cares about indentation
Use in instead of ==

