练习代码如下
# coding: utf-8
__author__ = 'www.py3study.com'
people = 20
cats = 30
dogs = 15
if people < cats:
print("Too many cats! The world is doomed!")
if people > cats:
print("Not many cats! The world is saved!")
if people < dogs:
print("The world 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 equal to dogs.")
if people == dogs:
print("People are dogs.")
应该看到的结果
常见问题
+=是什么意思?
x += 1 和 x = x + 1一样,只是+=这种写法更省时间