How to Iterate Over a Slice in Reverse in Go

In Golang, there are 2 ways to iterate over a slice in reverse
Created
Modified

Using For Loop

There is no convenient operator for this to add to the range one in place. You'll have to do a normal for loop counting down.

See the following example:

package main

import (
  "fmt"
)

func main() {
  s := []string{"a", "b", "c", "d"}
  for i := len(s) - 1; i >= 0; i-- {
    fmt.Println(s[i])
  }
}
d
c
b
a

Using For Range

You can also do:

package main

import (
  "fmt"
)

func main() {
  s := []string{"a", "b", "c", "d"}

  l := len(s)
  for i := range s {
    fmt.Println(s[l-1-i])
  }
}
d
c
b
a

Related Tags

#iterate# #reverse#

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