Python 入門　ノート　（26）inとnotの使いどころ

inとnotの使いどころ

in

y = [1, 2, 3]
x = 1
if x in y:
print('in')

in

not

y = [1, 2, 3]
x = 1
if 100 not in y:
print('not in')

not in

a = 1
b = 2
if a != b:
print('Not equal')

Not equal

notの使いどころ

boolean型

is_ok = True

#if is_ok == True:
if is_ok:
print('hello')

hello

is_ok = True
if not is_ok:
print('hello')