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Go Language Go Language Overview Data Structures Looping Over Slices

Ronnie Hess
Ronnie Hess
18,124 Points

Looping over slices: I answered the question and got credit... but I think I did it wrong?

When I answered this question (which said in the prompt not to worry about the index), I set up a pretty normal for loop.

I couldn't figure out how to set up a proper for loop without the i for index, but... then I would get an error for not doing anything with the declared i variable!

I just said that i was i to get around it. It worked for the purposes of getting credit but does not seem like best practice.

I commented that trick out in the attached code. How should I make this more appropriate? Get rid of the i variable entirely?

package utility

import "fmt"

func PrintEach(slice []string) {
  for i, v := range slice {
    // i = i
    //When I do that, it works, but... FEELS wrong? What's RIGHT?

1 Answer

Steven Parker
Steven Parker
229,921 Points

The conventional placeholder for an ignored value is a single underscore:

  for _, v := range slice {