逻辑处理(if,elif,else)

2019-01-01
一、单个逻辑处理

_username = 'Izaiah'
_password = '123'

username = input("username:")
password = input("password:")

if _username == username and _password == password :
    print("Welcome user {name} login..." .format(name=username))
else:
    print("Invalid username or password!")

二、多个逻辑处理

age_of_oldboy = '56'
guss_age = input("guss the age:")
if guss_age == age_of_oldboy :
    print("yes,you got it.")
elif guss_age > age_of_oldboy :
    print("please guss smaller.")
else:
    print("please guss bigger.")