if, elif, else

# if

x = True

if x is False:
    print('True입니다')
    print('indentation')
print('no indentation')
    
====Result====
no indentation

x = True

if x is True:
    pass
print('pass')

====Result====
pass

x = 34

if x>10:
    print('x>10')
    if x>20:
        pass
        if x>30:
            print('x>30')
print('end')

====Result====
x>10
x>30
end

x = 25

# if x>10 and x<30 :
if 10 < x < 30: #simplify
    print('10<x<30')
else:
    print('10>x or 30<x')
    
====Result====
10<x<30

# else

x = 24

if x>30:
    print('over 30')
else:
    print('uner 30')
    
====Result====
uner 30

x = 4
y = x if x == 10 else 0
'''
# same as
if x == 10:
    y = x
else:
    y = 0    
'''

print(y)

====Result====
0

if True:
    print('참')  # True는 참
else:
    print('거짓')

if False:
    print('참')
else:
    print('거짓')  # False는 거짓

if None:
    print('참')
else:
    print('거짓')
    
====Result====
참
거짓
거짓

if 0:
    print(True)
else:
    print(False)

if 1:
    print(True)
else:
    print(False)

if 0x1F: # hex
    print(True)
else:
    print(False)

if 0b1000:  # binary
    print(True)
else:
    print(False)

if 0o71:  # binary
    print(True)
else:
    print(False)

if 13.5:
    print(True)
else:
    print(False)

if 0.0:
    print(True)
else:
    print(False)

if 'hello':
    print(True)
else:
    print(False)

if '':
    print(True)
else:
    print(False)

if not '':
    print(True)
else:
    print(False)
    
====Result====
False
True
True
True
True
True
False
True
False
True

 

# elif

x = 25

if x>30:
    print('x>30')
elif x>20:
    print('x>20')
else:
    print('x<20')
print('end')

====Result====
x>20
end