《笨办法学python3-Learn Python 3 the HARD WAY》-习题29 if语句

学习内容：

people = 20
cats = 30
dogs = 15


if people < cats:
    print ("Too mant cats! The world is doomed!")

if people >cats:
    print ("Not many cats! The world is saved!")

if people < dogs:
    print ("The worls is drooled on!")

if people > dogs:
    print ("The world is dry!")


dogs += 5

if people >= dogs:
    print ("People are greater than or equal to dogs.")

if people <= dogs:
    print ("People are less than or equle to dogs.")


if people == dogs:
    print ("People are dogs.")

运行结果：

知识点：
1.你认为if对它的下一行代码做了什么？为什么if的下一行需要4个空格的缩进？
若if后面返回的时True则执行if下面的内容。
if的下一行需要4个空格的缩进，和函数意义一样，这是包含在if里的内容
2.若是不缩进会发生什么？
会报错：

来源：CSDN

作者：猕猴晓桃

链接：https://blog.csdn.net/weixin_42387340/article/details/103235464