How can I iterate over a string by runes in Go?

January 7, 2023 by Tarik

See this example from Effective Go :

for pos, char := range "日本語" {
    fmt.Printf("character %c starts at byte position %d\n", char, pos)
}

This prints :

character 日 starts at byte position 0
character 本 starts at byte position 3
character 語 starts at byte position 6

For strings, the range does more work for you, breaking out individual
Unicode code points by parsing the UTF-8.