Unicode in Go

The type rune is a synonym int32. byte is a synonym uint8. We can create [] rune (or [] int32) for a unicode string. For a string which only has ASCII characters, we can create [] byte, [] uint8 or [] rune. To convert this array back to string, use string(array value). See the below example.

package main

import (
    "fmt"
)

func main() {
    var s, t string
    var r, k []rune
    s = "世界和平"

    //create an array of rune. Also can do r =[]int32(s)
    r = []rune(s)

    //change back to string
    t = string(r)

    fmt.Println(t)

    k = []rune{19990, 30028, 21644, 24179}

    fmt.Println(string(k))
}

convert string to array; Then convert back for string which has only ASCII characters

package main

import (
    "fmt"
)

func main() {
    var s, t string
    var r []uint8
    s = "hello world"

    r = []uint8(s)

    //change back to string
    t = string(r)

    fmt.Println(t)

}