Fibonacci in Go

Published on 28 April 2022 (Updated: 02 February 2023)

Fibonacci in Go

Welcome to the Fibonacci in Go page! Here, you’ll find the source code for this program as well as a description of how the program works.

Current Solution

package main

import (

func fibonacci(n int, c chan int) {
	x, y := 1, 1
	for i := 0; i < n; i++ {
		c <- x
		x, y = y, x+y

func exitWithError() {
	fmt.Println("Usage: please input the count of fibonacci numbers to output")

func main() {
	if len(os.Args) != 2 {

	n, err := strconv.Atoi(os.Args[1])
	if err != nil {

	c := make(chan int, n)

	go fibonacci(cap(c), c)
	i := 1
	for v := range c {
		fmt.Printf("%d: %d\n", i, v)

Fibonacci in Go was written by:

If you see anything you’d like to change or update, please consider contributing.

Note: The solution shown above is the current solution in the Sample Programs repository as of Apr 07 2019 00:40:32. The solution was first committed on Feb 24 2019 19:38:47. As a result, documentation below may be outdated.

How to Implement the Solution

No ‘How to Implement the Solution’ section available. Please consider contributing.

How to Run the Solution

No ‘How to Run the Solution’ section available. Please consider contributing.