Golang program to delete an item from a map

Here, we are going to learn how to delete an item from a map in Golang (Go Language)?
Submitted by Nidhi, on March 24, 2021

Problem Solution:

In this program, we will create a simple map to store CountryCode using the make() function. Then we delete the specified item from the map using the delete() function. After that, we will store and print items of the map on the console screen.

Program/Source Code:

The source code to delete an item from a map is given below. The given program is compiled and executed successfully.

// Golang program to delete an item from a map

package main

import "fmt"

func main() {
	CountryCode := make(map[string]int)

	CountryCode["ind"] = 101
	CountryCode["aus"] = 102
	CountryCode["eng"] = 103
	CountryCode["pak"] = 104
	CountryCode["usa"] = 105

	delete(CountryCode, "pak")

	fmt.Println("India    :", CountryCode["ind"])
	fmt.Println("Australia:", CountryCode["aus"])
	fmt.Println("England  :", CountryCode["eng"])
	fmt.Println("Pakistan :", CountryCode["pak"])
	fmt.Println("USA      :", CountryCode["usa"])
}

Output:

India    : 101
Australia: 102
England  : 103
Pakistan : 0
USA      : 105

Explanation:

In the above program, we declare the package main. The main package is used to tell the Go language compiler that the package must be compiled and produced the executable file. Here, we imported the fmt package to formatting related functions.

In the main() function, we created a CountryCode map using make() function to store country code of specified country. Map store items in KEY/VALUE pair. Then we removed "pak" from CountryCode map using delete() function. After that, we printed the items of the map on the console screen.

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