#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Datatime:2022/7/18 21:13
# Filename:011 Python约定俗称的常量.py
# Toolby: PyCharm
# 变量：变化的量，可以通过各种操作改变它
# 不变的量：nick 的帅，当你定义它的时候，就定死了
height = 180
print(height)
height = 181
height = height + 1
print(height)
nick_meimaodu = 100
print(nick_meimaodu)
nick_meimaodu = nick_meimaodu + 1
print(nick_meimaodu)
# 常量：不变化的量
# 常量的定义--》常量名的字母全部大写
NICK_MEIMAODU = 100
print(NICK_MEIMAODU)
NICK_MEIMAODU = NICK_MEIMAODU + 1
NICK_MEIMAODU = '帅'
NICK_MEIMAODU = '更帅'
print(NICK_MEIMAODU) # 100 或者 报错
# 常量和变量由区别吗？
# 有，常量是程序猿约定俗成的
NICK_MEIMAODU = 100
NICK_MEIMAODU = NICK_MEIMAODU+1 # 硬着头皮去修改别人，你是脑子抽风了
# 常量一般用在设置里面
