代码执行代码执行str1 = 'Hello, World!'last_character = str1[-1]输出 last_character 关系图 下面是一个使用mermaid语法绘制的关系图,展示字符串、索引和最后一位字符之间的关系: erDiagram STRING }|-- 0..* { CHARACTER : 包含 STRIMG }|-- 0..* { INDEX : 使用 INDEX }|-- 1 { CHARACTER :...
下面是一个简单的Python字符串类的类图: String- str: str+__init__(str)+get_last_character() : str 通过上面的代码示例和图示,相信读者已经对如何使用Python来判断字符串的最后一个字符有了一定的了解。这些方法简单直接,易于掌握,在实际应用中也非常实用。希望本文对读者有所帮助,谢谢阅读!
We’re not changing the underlying string that was assigned to it before. We’re assigning a whole new string with different content. In this case, it was pretty easy to find the index to change as there are few characters in the string.How are we supposed to know which character to ch...
>>>print("ascii:%c"%'s')#格式化输出字符ascii:s>>>print("ascii:%c"%'1')#格式化输出数字ascii:1 >>>print("str:%s"%'character string')#格式化字符串str:character string>>>print("str:%d"%888)#格式化整数str:888 >>>print("str:%f"%888)#格式浮点数str:888.000000 >>>print("str:%e"%...
string = “Hello” second_last_character = string[-2] print(second_last_character) # 输出 “l” “` 3. 切片操作: “`python string = “Hello World” substring = string[-5:-1] print(substring) # 输出 “Worl” “` 4. 遍历字符串的每一个字符: ...
last_character=my_string[-1] print(last_character)# 输出:"!" 在上述示例中,我们创建了一个包含字符串内容的变量my_string。然后,通过将索引值设为-1来访问字符串最后一个字符,并将其赋值给变量last_character。最后,我们使用打印语句输出了变量的值。 需要注意的是,字符串也是一种序列类型,因此负数索引同样...
if last_occurrence == -1: print("Character 'z' not found in the string.") else: print("Last occurrence of 'z' is at index:", last_occurrence) # 输出:Character 'z' not found in the string. ``` 4. 使用循环和条件语句查找多个字符的最后出现位置 ...
一、交互式环境与print输出 1、print:打印/输出 2、coding:编码 3、syntax:语法 4、error:错误 5、invalid:无效 6、identifier:名称/标识符 7、character :字符 二、字符串的操作 1、user:用户 2、name:…
So Python returns a new string to me. 我也可以使用负索引进行切片。 I can also do slicing using negative indices. 例如,如果我键入S,减去3,Python将给出该序列中的最后三个字符,即h、o和n。 So for example, if I type S, minus 3, Python will give me the last three characters in that sequ...
str = 'Antarctica is really cold.' a = len(str) print('length of str ', a) #last character with the help of length of the string print('str[a] ', str[a-1]) #last character with the help of indexing print('str[-1] ',str[-1]) 输出: str 26str [a]的长度。str [-1]。