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Go – How to delete element from map in go

In this tutorial, We are going to learn about how to delete or remove element from map in go. We can do it by using delete() built-in function in go.

delete() built-in function deletes the element from map based on key.

Function prototype:

delete(map_name, key)

Input Parameters:

map_name: map name from where element to 
be removed.

key: This is key to be removed from map

Example with code:

package main

import (
  "fmt"
)

func main() {

  day := make(map[string]int)

  day["Sunday"] = 0

  day["Monday"] = 1

  day["Tuesday"] = 2

  day["Wedenday"] = 3


  fmt.Println("Before deleting elements: ")

  for key, val := range day {

    fmt.Println(key, val)

  }


  delete(day, "Monday")


  fmt.Println("After deleting elements: ")

  for key, val := range day {

    fmt.Println(key, val)

  }

}

Output:

Before deleting elements:

Sunday 0
Monday 1
Tuesday 2
Wedenday 3


After deleting elements:

Sunday 0
Tuesday 2
Wedenday 3

To learn more about golang, You can 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
Posted in builtin, golang

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