2019-06-11_Python条件语句

#!/usr/bin/python
# -*- coding: UTF-8 -*-

# coding=utf8
# 例1：if 基本用法

# flag = False
# name = 'python'
# if name == 'python':         # 判断变量否为'python'
#     flag = True          # 条件成立时设置标志为真
#     print 'welcome boss'    # 并输出欢迎信息
# else:
#     print name              # 条件不成立时输出变量名称


# 例2：elif用法

# num = 5
# if num == 3:  # 判断num的值
#     print 'boss'
# elif num == 2:
#     print 'user'
# elif num == 1:
#     print 'worker'
# elif num < 0:  # 值小于零时输出
#     print 'error'
# else:
#     print 'roadman'  # 条件均不成立时输出



# 例3：if语句多个条件

# num = 9
# if num >= 0 and num <= 10:    # 判断值是否在0~10之间
#     print 'hello'
#
# num = 10
# if num < 0 or num > 10:    # 判断值是否在小于0或大于10
#     print 'hello'
# else:
#  print 'undefine'
#
# num = 8
# # 判断值是否在0~5或者10~15之间
# if (num >= 0 and num <= 5) or (num >= 10 and num <= 15):
#     print 'hello'
# else:
#     print 'undefine'

# 例四：简单的语句组
# var = 100
#
# if (var == 100):
#     print "变量 var 的值为100"
#     print "Good bye!"