a = 20
b = 30

print(not a < b)
print( a<b and a!=b )
print( a==b or a!=b )

# True -> 1. False -> 0
print(True + 1)
print((a>b)+1)

#캐스팅
print(bool(10),bool(0))
print(bool(3.14),bool(0.))
print(bool('abcd'),bool(''))
print(bool({'a':2}),bool({}))
print(bool(None))






