What is the escape character in Go language
在Go语言中,转义字符是一种特殊的字符常量,以反斜线"\"开头,后跟一个或几个字符,具有不同于字符原有的意义。所谓转义,可以理解为 “采用某些方式暂时取消该字符本来的含义”,这里的 “某种方式” 指的就是在指定字符前添加反斜杠“\”,以此来表示对该字符进行转义。
本教程操作环境:windows7系统、GO 1.18版本、Dell G3电脑。
Go语言中转义符是什么
转义字符是一种特殊的字符常量。转义字符以反斜线"\"开头,后跟一个或几个字符。转义字符具有特定的含义,不同于字符原有的意义,故称“转义”字符。
在编程中有一些字符是打不出来的,比如换行,提示音,下一个制表位等等,于是程序语言的开发者就设计了转义序列(escape sequence)这种东西用来表达这些字符。
所谓转义,可以理解为 “采用某些方式暂时取消该字符本来的含义”,这里的 “某种方式” 指的就是在指定字符前添加反斜杠 \,以此来表示对该字符进行转义。
Go语言常用转义字符
转义字符 | 说明 |
---|---|
\t | 表示一个制表符,通常使用它可以排版 |
\n | 换行符 |
\ | 一个\ |
" | 一个" |
\r | 一个回车 |
转义字符的案例
Go语言制表符
Go 语言 制表符的转义字符为 \t
。
package main import "fmt" func main() { fmt.Println("Hello world") fmt.Println("Hello \tworld") }
程序运行,控制台输出,如下图:
Go语言换行符
Go 语言换行符的转义字符为 \n
。
package main import "fmt" func main() { fmt.Println("Hello world") fmt.Println("Hello \nworld") }
Go语言反斜杠
Go语言反斜杠的转义字符为 \\
。
package main import "fmt" func main() { fmt.Println("Hello world") fmt.Println("Hello \world") //Error }
我们可以看到,我们想在程序中输出单个反斜杠的时候,使用单个反斜杠程序会直接报错,我们需要使用双反斜杠来进行转义。我们将程序修改如下:
package main import "fmt" func main() { fmt.Println("Hello world") fmt.Println("Hello \\world") }
Go语言双引号
Go语言双引号的转义字符为 \"
。
package main import "fmt" func main() { fmt.Println("Hello world") fmt.Println("Hello \"world") }
程序运行,控制台输出,如下图:
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