Go 中的 Rune 文字可以表示多個字元嗎？

Multiple Characters in Rune Literals in Go

In Go, rune literals are represented using single quotes (' '), similar to character literals in other programming languages.

Consider the following code snippet:

package main

import "fmt"

func main() {
    var a int

    fmt.Printf("Enter the number : ")
    fmt.Scanf('%d', &a)

    if a%2 == 0 {
        fmt.Println("%d Is even number", a)
    } else {
        fmt.Println("%d is odd number", a)
    }
}

When this code is run, you may encounter an error because of an incorrect format specifier. To represent a character literal in a format specifier, you need to enclose it in double quotes ("). The corrected code snippet should be:

fmt.Println("%d is odd number", a)

Rune Literals vs. String Literals

It's important to note that single quotes are specifically used for rune literals, while double quotes are used for string literals. In Go, strings are sequences of runes.

Single-Character Rune Literals:

• 'a'
• 'ä'
• '本'
• '\t'
• '\000'
• '\007'
• '\377'
• '\x07'
• '\xff'
• '\u12e4'
• '\U00101234'

Note: Single quotes can also be used to escape characters within string literals, such as '\'' for a single quote character.

Remember, using single quotes for multiple characters or for incomplete escape sequences will result in errors.

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