You can skip the index or value by assigning to _.
_
for i, _ := range pow for _, value := range pow
If you only want the index, you can omit the second variable.
for i := range pow
package main
import "fmt"
func main() {
pow := make([]int, 10)
for i := range pow {
pow[i] = 1 << uint(i) // == 2**i
}
for _, value := range pow {
fmt.Printf("%d\n", value)