Python学习（八）用户输入-函数 inpt()

Python 用户输入

函数 inpt()工作原理

函数 inpt() 让程序暂停运行，等待用户输入一些文本。获取用户输入后，将值存储到一个变量中，值得类型为字符串

message = input("Tell me something, and I will repeat it back to you:")

print("===>>:%s"%(message))

Tell me something, and I will repeat it back to you:Hello everyone!
===>>:Hello everyone!

程序提示语句要清晰

使用input()函数时，需要指出用户需要输入的信息内容

name = input("Please enter your name :")

print("===>>:Hello %s !"%(name))

Please enter your name :jorbabe
===>>:Hello jorbabe !

input()获取数值输入

age = input("How old are you :")

print("===>>: %s type:%s "%(age,type(age)))

How old are you :15
===>>: 15 type:<class 'str'>

转换输入的数字类型int

age = input("How old are you :")

age = int(age)

print("===>>: %s type:%s "%(age,type(age)))

How old are you :15
===>>: 15 type:<class 'int'>

求模运算符

处理数值信息时，求模运算符(%)是一个很常用的工具，将两个数值相除并返回余数

age = input("Enter a number, and I'll tell you if it's even or odd:")

age = int(age)

print("===>>: %s type:%s "%(age,type(age)))

if age % 3 == 0 :

print("
The number %s is even ."%(age))

else:

print("
The number %s is odd ."%(age))

Enter a number, and I'll tell you if it's even or odd:15
===>>: 15 type:<class 'int'> 

The number 15 is even .


Enter a number, and I'll tell you if it's even or odd:16
===>>: 16 type:<class 'int'> 

The number 16 is odd .

Python 2.7 获取输入

在Python 2.7中输入模块使用 raw_input()

2.7中的input() 模块解读输入内容为运行代码，请勿使用