循序渐进学Python2变量与输入

新建一个test.py文件，右键选择“Edit with IDLE”，编辑完成后，Ctrl+S保存，然后按下F5就可以执行代码了。

注：IDLE是Python官方提供的一个IDE工具。

目录  [隐藏]  1 注释 2 数字 3 变量 4 输入用法

[编辑]注释

#This is a comment

print"This will run."#comment

多行注释使用三个单引号(''')或三个双引号(""")。

[编辑]数字

print 25 + 30 / 6

print"Is it true that 3+2 < 5-7?"

print 3+2<5-7

输出：

30
Is it true that 3+2<5-7?
False

[编辑]变量

cars =100

print"There are", cars,"cars available."

输出：

There are 100 cars available.

my_name ="Lei Jun"
your_name ="Jobs"

print"Let's talk about", my_name
print"Let's talk about %s and %s." % (my_name, your_name)

输出：

Let's talk about Lei Jun
Let's talk about Lei Jun and Jobs.

[编辑]输入用法

print"How old are you?"
age =raw_input()

print"You're %s old."% age

输出：

How old are you?
27
You're 27 old.

或

age =raw_input("How old are you?")

print"You're %s old."% age

输出：

How old are you?38
You're 38 old.