#bool True False
#int ----> str
i = 1
s = str(i)
#str ---> int
s = '123'
i = int(s)
i = 1
s = str(i)
#str ---> int
s = '123'
i = int(s)
#int ----->bool 只要是0 ----》False 非0就是True
i = 3
b = bool(i)
print(b)
#bool----> int
#True 1
#False 0
'''
ps:
while True:
pass
while 1: 效率高
pass
'''
i = 3
b = bool(i)
print(b)
#bool----> int
#True 1
#False 0
'''
ps:
while True:
pass
while 1: 效率高
pass
'''
#str --->bool
#s = "" -----> False
#非空字符串都是True
#s = "0" -----> True
#非空字符串都是True
#s = "0" -----> True
# s
# if s:
# print('你输入的为空,请重新输入')
# else:
# pass
# if s:
# print('你输入的为空,请重新输入')
# else:
# pass