nested functions in go

Question

I am trying to declear func in func in go language:

package main
import "fmt"

func main() {
    func plus(x int, y int) int {
        return x+y
    }
}

And the go compiler say:

.\hello.go:6:7: syntax error: unexpected plus, expecting (

when line 6 is the line of the return.

Can someone help me fix it?

Answer 1

Functions can only be declared at the package level. You could define an anonymous function and assign it to a variable if you only want to use it within the outer function:

func main() {
    plus := func(x int, y int) int {
        return x+y
    }
}

Though use cases for this are relatively rare.