Python编程 从入门到实践-2变量上

 笔记出处(学习UP主视频记录) ​​https://www.bilibili.com/video/av35698354?p=2​​

2.2 变量

message = "Hello Python world!"
print (message)

message = "Hello Pyhton Crash Course world!"
print (message)

Hello Python world!

Hello Pyhton Crash Course world!

2.2.2 使用变量时避免命名错误

message = "Hello Python Crash Course reader!"
print (mesage)

print (mesage)

NameError: name 'mesage' is not defined

2.3 字符串

print ("This is a string.")
print ('This is also a string.')

This is a string.

This is also a string.

2.3.1 使用方法修改字符串的大小写

name = "ada lovalace"
print (name.title())

Ada Lovalace

name = "ada Lovalace"
print (name.upper())

ADA LOVALACE

name = "ada Lovalace"
print (name.lower())

ada lovalace

2.3.2 合并(拼接)字符串

first_name = "ada"
last_name = "lovelace"
full_name = first_name + " " + last_name

print (full_name)

ada lovelace

first_name = "ada"
last_name = "lovelace"
full_name = first_name + " " + last_name

print ("Hello, " + full_name.title() + "!")

Hello, Ada Lovelace!

first_name = "ada"
last_name = "lovelace"
full_name = first_name + " " + last_name

message = "Hello, " + full_name.title() + "!"
print (message)

Hello, Ada Lovelace!

2.3.3 使用制表符或换行符来添加空白

print ("\tPython")
print ("Python")

　　　　Python

Python

print ("Language:\nPython\nC\nJavaScript")

Language:

Python

C

JavaScript

print ("Languages:\n\tPython\n\tC\n\tJaveScript")

Languages:

　　　　Python

　　　　C

　　　　JaveScript

作者： 阿飞