逻辑运算符

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#逻辑运算符 not and or
#逻辑运算符的优先级 not > and > or,若为同一优先级，则从左到右计算
#not为一元运算符，and,or均为二元运算符。and两边的式子，同时为真，则为真，有一个为假，则为假
#or运算符，表达式有一边为真则为真，否则为假
print(3<4 and 5>2)#True
print(3>4 and 5>2)#False
print(3>4 or 5>2)#True
print(3>4 or 5<2)#False
print(3<4 or 5>2)#True
print(3<4 and 5>2 or 3>4 or 5<2 and 3>4 and 5>2)#True
# a or b,若a为非零，则返回x
print(2 or 3)#2
print(5 or 6)#5
print(0 or 3)#3
print(0 or 6)#6
print(2 or 0)#2


#如果为and,a and b,如果a为真，则返回b,即a为非零，则返回b,与or相反
print(2 and 3)#3
print(5 and 6)#6
print(0 and 3)#0
print(0 and 6)#0
print(2 and 0)#0
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#bool值为True，False
print(bool(1))#True
print(bool(0))#False  

print(int(True))#1
print(int(False))#0