What's wrong with counting length?

Question

go

package main

import "fmt"
import "unicode/utf8"

func main() {
    fmt.Println(len("Hello World"))
    fmt.Println(utf8.RuneLen('слово'))
}

# command-line-arguments
.\len.go:8: missing '
.\len.go:8: syntax error: unexpected catchy, expecting comma or )

Answer 1

package main

import "fmt"
import "unicode/utf8"

func main() {
    fmt.Println(len("слово"))
    fmt.Println(utf8.RuneCountInString("слово"))
}