string 无法在 golang 中用单引号分配字符串
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Cannot assign string with single quote in golang
提问by shivams
I am learning go and when playing with string I noticed that if a string is in single quotes then golang is giving me an error but double quotes are working fine.
我正在学习 go，在玩字符串时，我注意到如果字符串是单引号，那么 golang 会给我一个错误，但双引号工作正常。
func main() {
var a string
a = 'hello' //will give error
a = "hello" //will not give error
}
This is the error I get on my system:
这是我在系统上遇到的错误：
illegal rune literal
While when I try to do the same on playground I am getting this error:
当我尝试在操场上做同样的事情时，我收到了这个错误：
prog.go:9: missing '
prog.go:9: syntax error: unexpected name, expecting semicolon or newline or }
prog.go:9: newline in string
prog.go:9: empty character literal or unescaped ' in character literal
prog.go:9: missing '
I am not able to understand the exact reason behind this as in for example Python, Perl one can declare a string with both single and double quote.
我无法理解这背后的确切原因，例如在 Python 中，Perl 可以声明一个带有单引号和双引号的字符串。
回答by ti7
In Go, '?'represents a single character (called a Rune), whereas "?"represents a string containing the character ?.
在 Go 中，'?'表示单个字符（称为 Rune），而"?"表示包含字符 的字符串?。
This is true in many programming languages where the difference between strings and characters is notable, such as C++.
在字符串和字符之间的区别很明显的许多编程语言中都是如此，例如 C++。
Check out the "Code points, characters, and runes" section in the Go Blog on Strings
查看Go 字符串博客中的“代码点、字符和符文”部分
回答by Jawadh Salih Rifath
Go is a statically typed language. Also GOis not a scripting language. Though we see GOis running like a scripting language, it is compiling the source we write and then execute the main function. So, we should treat GOas C, JAVA, C++where single quote ''is used to declare characters (rune, char) unlike scripting languages like Python or JavaScript.
Go 是一种静态类型语言。另外GO是不是一种脚本语言。虽然我们看到GO它像脚本语言一样运行，但它正在编译我们编写的源代码，然后执行 main 函数。因此，与 Python 或 JavaScript 等脚本语言不同，我们应该将其GO视为使用C, JAVA, C++单引号''来声明字符 ( rune, char) 的地方。
I think as this is a new language, and current trend is lying with scripting languages, this confusion has been occurred.
我认为由于这是一种新语言，而当前的趋势是脚本语言，因此出现了这种混乱。
