Recursive Anonymous Function in Golang

Recursion is a process in which a function calls itself implicitly or explicitly and the corresponding function is called recursive function. Go language supports special feature called anonymous function. It is a function that doesn’t contain any name. It is used to create an inline function. Recursive functions can be declared & defined as anonymous also. A recursive anonymous function is also known as recursive function literal.

Syntax:

func(parameter-list)(return-type){
// code..
// call same function
// within the function
// for recursion
// Use return statement only
// if return-type are given.
return
}()

Example:

// Golang program to show
// how to create an recursive
// Anonymous function
package main

import "fmt"

func main() {

    // Anonymous function
    var recursiveAnonymous func()
    recursiveAnonymous = func() {

        // Printing message to show the
        // function call and iteration.
        fmt.Println("Anonymous functions could be recursive.")

        // Calling same function
        // recursively
        recursiveAnonymous()

    }

    // Main calling of
    // the function
    recursiveAnonymous()

}

Output:

Anonymous functions could be recursive.
Anonymous functions could be recursive.
Anonymous functions could be recursive.
Anonymous functions could be recursive.
.
.
.
.
Infinite times function calls.

Example 2:

// Golang program to show
// how to create an recursive
// Anonymous function
package main

import (
    "fmt"
)

func main() {

    // Anonymous function
    var recursiveAnonymous func(int)

    // Passing arguments
    // to Anonymous function
    recursiveAnonymous = func(variable int) {

        // Checking condition
        // to return
        if variable == -1 {

            fmt.Println("Welcome to Geeks for Geeks!")
            return
        } else {

            fmt.Println(variable)

            // Calling same
            // function recursively
            recursiveAnonymous(variable - 1)
        }
    }

    // Main calling
    // of the function
    recursiveAnonymous(10)
}

Output:

10
9
8
7
6
5
4
3
2
1
0
Welcome to Geeks for Geeks!