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) 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:
C
JavaScript
print ("Languages:\n\tPython\n\tC\n\tJaveScript") Languages:
Python
C
JaveScript
作者：
阿飞