How to find the index of a value in a slice

package main

import (
	"fmt"
	"slices"
)

func main() {
	s := []string{"🌱", "🪡", "🌱"}
	x := "🪡"
	y := "🙈"

	fmt.Println("slices.Index:")
	fmt.Printf("index of \"%s\"? %v\n", x, slices.Index(s, x))
	fmt.Printf("index of \"%s\"? %v\n", y, slices.Index(s, y))

	fmt.Println("---")

	fmt.Println("Index:")
	fmt.Printf("index of \"%s\"? %v\n", x, Index(s, x))
	fmt.Printf("index of \"%s\"? %v\n", y, Index(s, y))
}

// Index returns the index of the first occurrence of v in s.
// Index returns -1 if v is not found in s.
func Index(s []string, v string) int {
	for i, vs := range s {
		if vs == v {
			return i
		}
	}

	return -1
}