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print('*' * 10 + '10') #用‘*‘来输出多个重复字符串和用’+‘来连接字符串和变量
print("price") #输出price
print(price) #输出变量price的值
Print('''
你好!
快去卷吧。
''' )#用三引号来输出多行内容
course = 'python'
Print(course[0:3])#用索引符输出 结果为 pyt
Name = 'abb'
First = 'his name is' + Name
Second = f'his name is {Name}' #first和second定义的是一样的字符串,用f置于字符串前,用{}框住变量
course = 'Python'
print(len(course)) #测量字符串的长度
print(course.upper())
'''方法 用于特定对象如字符串或整数之类的非通用函数 称为方法 变量名.函数名()如course.upper()
upper()将字符串变大写 lower()变小写 find('thon')寻找'thon'在字符串中位置 replace(P,J)用J替代P
这些是字符串的方法'''
'th' in course #判断某段字符是否在字符串中存在
#'**'表示平方 '//'表示整除 '-=''+='增减运算符
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