【Python初学者】准备

准备着手学习Python这门久仰大名的语言。本篇随笔是学习它的准备阶段。

操作系统：

Mac OS 10.11.5

下载编辑器Testwrangler

点我

第一个Python程序

在命令行中运行python：

在命令行中新建文件夹ChenPython，并且在其中新建文件 MyFirstPythonProgram

换名字，改成.py格式；然后编辑它，在终端运行：python MyFirstPythonProgram.py

井号的作用

在python中，#是注释的意思。

#Python examples 2016/9/19 by wasdns
print "HelloWorld!"
#End of file

#的英文名是pound character。

简单计算

#Python Examples 2016/9/19 by Wasdns
print "Calculator:" 30 + 25 / 5
print "Calculator:" 30 % 5
#End of file

哈哈，首错：

更改：

#Python Examples 2016/9/19 by Wasdns
print "Calculator:", 30 + 25 / 5
print "Calculator:", 30 % 5
#End of file

输出结果：

增加大小比较：

#Python Examples 2016/9/19 by Wasdns
print "Calculator:", 30 + 25 / 5
print "Calculator:", 30 % 5

print "Pause..."

print "It's it true? 3 + 3 < 9", 3 + 3 < 9
print "Did the Terminal print true?"
#End of file

输出：

变量

#Python Examples 2016/9/19 by Wasdns
print "Calculator:", 30 + 25 / 5
print "Calculator:", 30 % 5

print "Pause..."

print "It's it true? 3 + 3 < 9", 3 + 3 < 9
print "Did the Terminal print true?"

print "Add a variable..."

Iamboy = 1
Sheisgirl = 1
Iamgirl = 0
Sheisboy = 0

print "Iamboy = ", Iamboy, " Sheisgirl = ", Sheisgirl, " Iamgirl = ", Iamgirl, " Sheisboy = ", Sheisboy

print "Add Finished..."

#End of file

输出：

2016/9/19