5-判断条件if

# 待用户输入年龄
a = input('age = ')
# 将用户输入的字符串转化为整数
age = int(a)
# 进行判断，并输出结果
if age >= 18:
    print('adult')
elif age >= 6:
    print('teenager')
else:
    print('kid')

age = 17
teenager