Function Definitions

In Go functions are declared using the func keyword:

function.go

func myFunction() {
    fmt.Println("Hello, World!")
}

This is similar to JavaScript/TypeScript, but with a few differences in syntax and usage.

Anonymous Functions

Like JavaScript/TypeScript, Go also supports anonymous functions.

anonymous_function.go

func main() {
    myFunc := func() {
        fmt.Println("Hello from an anonymous function!")
    }
    myFunc()
}

Immediately Invoked Function Expressions (IIFE)

It’s possible to define an anomymous function and immediately execute it, similar to IIFE’s.

iife.go

func main() {
    func() {
        fmt.Println("Hello from an IIFE!")
    }()
}

Common when you deal with more advanced Go features like channels.