Understand the judgment logic of the end character of a string in Golang

In order to understand the logic of determining the end character of a string in Golang, we must first understand the basic characteristics and related functions of strings in Golang. In Golang, a string is an immutable sequence of bytes that can contain arbitrary data, but is usually used to store Unicode character sequences.

In Golang, we can use the built-in len function to get the length of a string, as well as access individual characters in a string by index. In addition, Golang also provides the strings package to handle string-related operations, including functions such as determining substrings and splicing strings.

For determining the end character of a string, a common method is to use string slicing to obtain the last character of the string. The following is a specific code example:

package main

import (
    "fmt"
)

func main() {
    str := "Hello, World!"
    
    // 获取字符串的长度
    length := len(str)
    
    // 判断字符串是否为空
    if length == 0 {
        fmt.Println("字符串为空")
        return
    }
    
    // 获取字符串的最后一个字符
    lastChar := str[length-1]
    
    // 判断最后一个字符是否为感叹号
    if lastChar == '!' {
        fmt.Println("字符串以感叹号结尾")
    } else {
        fmt.Println("字符串不以感叹号结尾")
    }
}

In the above code example, we first define a string "Hello, World!", and then calculate the length of the string and get the last character, Determine whether the string ends with an exclamation mark. After running this code, if the string ends with an exclamation mark, it will output "String ends with exclamation mark", otherwise it will output "String does not end with exclamation mark".

Through the above code example, we can see the logic in Golang to determine the end character of a string by getting the length of the string and the last character. This method is very practical when processing simple string operations, and can also be combined with functions in the strings package to implement more complex string processing logic.

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