#coding=gbk

#变量

message_1 = 'aAa fff'

message_2 = 'hart'

message_3 = "Albert Einstein once said, “A person who never made a mistake never tried anything new.”"

#使用方法修改字符串的大小写

print(message_1.title())

print(message_1.upper())

print(message_1.lower())

#字符串拼接

print(message_1+" "+message_2)

#使用制表符或换行符来添加空白

print("\tPython")

print("Python\nJava\nJavaScript")

#删除空白

#删除字符串末尾空白rstrip()

#删除字符串开头的空白lstrip()

#删除字符串两端的空白strip(),效果等于Java中的trim()

favorite_language='\tpython  '

print("My favorite language is "+favorite_language.rstrip()+".")

print("My favorite language is "+favorite_language.lstrip()+".")

print("My favorite language is "+favorite_language.strip()+".")

#字符串替换

a='Hello World'

b=a.replace('World','Python')

#整数

num=23

print(num)

#**表示乘方运算

print(num**2)

#浮点数

num_1=0.1

print(num_1*2)

#使用str()避免类型错误

print(str(23)+"james")