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Go – Prev() function in list package in go golang

In this tutorial, we are going to learn about Prev() function in list package in go golang. Prev() function is used to get the previous element in list in go golang.

Prev() function proto type:

 func (ele *Element) Prev() *Element 

Return value of Prev():

 Prev() returns the previous element in list or nil. 

To learn more about list package in go, Please follow this link

Example to use Prev() function in list:

package main

import (
  "container/list"
  "fmt"
)

func main() {
  // Create a new list and insert elements in it.
  l := list.New()
  l.PushBack(1)
  l.PushBack(2)
  l.PushBack(3)

  // get the head of the list
  ele := l.Back()
  fmt.Println(ele.Value)

  // get previous element of the list
  ele = ele.Prev()
  fmt.Println(ele.Value)

  // get previous element of the list
  ele = ele.Prev()
  fmt.Println(ele.Value)
}

Output:

 3
2
1

To learn more about golang, Please refer given below link:

https://www.techieindoor.com/go-lang-tutorial/

References:

 https://golang.org/doc/
https://golang.org/pkg/
https://golang.org/pkg/fmt/
https://golang.org/pkg/fmt/#Println
https://golang.org/pkg/container/list/
Posted in golang, list package

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