Python中的条件判断
# 条件判断# 1
print("#1")
age = 20
if age >= 18:
print('your age is', age)
print('adult')
print("---------------------")
# 2
print("#2")
age = 3
if age >= 18:
print('your age is', age)
print('adult')
else:
print('your age is', age)
print('teenager')
print("---------------------")
# 3
print("#3")
age = 3
if age >= 18:
print('adult')
elif age >= 6:
print('teenager')
else:
print('kid')
print("---------------------")
# 4
print("#4")
s = input('birth: ')
# input返回的数据类型是str,不能直接和整数比较,用int()强转
# 当然如果输入类似'abc'这种非数字时，需要捕获程序运行期的错误,这里不展开讨论
birth = int(s)
if birth < 2000:
print('00前')
else:
print('00后')
print("---------------------")
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