练习30--else和if

一 代码及执行结果

ex30.py

people = 14
cars = 15
trucks = 10

if cars > people:
    print("We should take the cars.")
elif cars < people:
    print("We should not take the cars.")
else:
    print("We can't decide.")

if trucks > cars:
    print("That too many trucks.")
elif trucks < cars:
    print("Maybe we could take the trucks.")
else :
    print("We stil can't decide.")

if people > trucks:
    print("Alright,let's just take the trucks.")
else:
    print("Fine, let's stay home then.")

执行结果：

PS E:3_work4_python2_code_python2_LearnPythonTheHardWay> python ex30.py
We should take the cars.
Maybe we could take the trucks.
Alright,let's just take the trucks.

一些问题：

1. 试着猜猜 elif 和 else 的作用是什么。

在if的条件不满足的情况下进行下一步判断，并执行另外的操作