Questions And Answers

More Tutorials

Go nil value

In Go, nil is the zero value for pointers, interfaces, maps, slices, channels and function types, representing an uninitialized value.

nil doesn't mean some "undefined" state, it's a proper value in itself. An object in Go is nil simply if and only if it's value is nil, which it can only be if it's of one of the aforementioned types.

An error is an interface, so nil is a valid value for one, unlike for a string. For obvious reasons a nil error represents no error.

Example of nil in Go

package main

import "fmt"

func main() {
	fmt.Println("nill is", nil)
	nil := 123
	fmt.Println("nill is", nil)


nill is
nill is 123


In this page (written and validated by ) you learned about Go nil value . What's Next? If you are interested in completing Go tutorial, your next topic will be learning about: Go Type casting - conversion.

Incorrect info or code snippet? We take very seriously the accuracy of the information provided on our website. We also make sure to test all snippets and examples provided for each section. If you find any incorrect information, please send us an email about the issue:

Share On:

Mockstacks was launched to help beginners learn programming languages; the site is optimized with no Ads as, Ads might slow down the performance. We also don't track any personal information; we also don't collect any kind of data unless the user provided us a corrected information. Almost all examples have been tested. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. By using, you agree to have read and accepted our terms of use, cookies and privacy policy.