In Golang string is a sequence of bytes. A string literal actually represents a UTF-8 sequence of bytes. In UTF-8, ASCII characters are single-byte corresponding to the first 128 Unicode characters. All other characters are between 1 -4 bytes. Due to this, it is not possible to index a character in a string. In GO, rune data type represents a Unicode point. Once a string is converted to an array of rune then it is possible to index a character in that array of rune.
You can learn more about rune here – /understanding-rune-in-golang
For this reason in below program for deleting a character of a given string by index, we are first converting a string into a rune array so that we can index the rune array and then delete the character by index
package main
import "fmt"
func main() {
sample := "ab£c"
s := []rune(sample)
res := delChar(s, 2)
fmt.Println(string(res))
}
func delChar(s []rune, index int) []rune {
return append(s[0:index], s[index+1:]...)
}Output:
abc