Go Enum

An enum, or enumerator, is a data type consisting of a set of named constant values. Enums are a powerful feature with a wide range of uses. However, in Golang, they’re implemented quite differently than most other programming languages. In Golang, we use a predeclared identifier, iota, and the enums are not strictly typed.

Example of Go Enum

package main
import "fmt"

type Direction int

const (
    North Direction = iota
    South
    East
    West
)

func main() {

    var myDirection Direction
    myDirection = West

    if (myDirection == West) {
      fmt.Println("myDirection is West:", myDirection)
    }
}

Output

myDirection is West: 3

Passing Enum to function as Parameter in Go

package main
import "fmt"

type Direction int

const (
    North Direction = iota
    South
    East
    West
)

func printDirection(myDirection Direction){
    if (myDirection == West) {
      fmt.Println("myDirection is West:", myDirection)
    }
}
func main() {
	var myDirection Direction
    myDirection = West
    printDirection(myDirection)
}

Output

myDirection is West: 3

Conclusion

In this page (written and validated by A. Gawali) you learned about Go Enum . What's Next? If you are interested in completing Go tutorial, your next topic will be learning about: Go Json Marshal Unmarshal.

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