Go Goroutines

How it works

A goroutine runs a function concurrently with other goroutines. The go statement does not wait for completion, and the process can exit while work is still running. Use an explicit join or result channel instead of guessing a sleep duration.

Run this Go example

Install Go separately from the official Go downloads and check go version in a new terminal. The reviewed baseline is Go 1.27.3 on Windows amd64; the authored syntax and standard-library APIs require Go 1.22 or newer. Save the complete source below as goroutines.go in a learning folder, then run go run goroutines.go from that folder. These examples use only the standard library.

Bhylu has no Go browser runner. Apache, MySQL, PHP and the JavaScript or Python playground are not required to run these files. File examples own a temporary directory; HTTP client examples create an ephemeral loopback server and close it. They do not contact an external API.

Download the complete goroutines.go · Download all source files with hash checks

For the optional collection download, save download-examples.mjs in a new learning folder and run node download-examples.mjs. A local preview uses node download-examples.mjs http://127.0.0.1:8000/examples/go/. The downloader refuses an existing bhylu-go-examples folder and installs or executes no Go code.

Example

package main

import (
	"fmt"
)

func main() {
	done := make(chan string)
	go func() { done <- "P-51 checked" }()
	fmt.Println(<-done)
}

Expected result

P-51 checked

The unbuffered send waits until main receives the string. Receiving is the join point for this small example. Concurrency permits overlapping work; it does not promise a speedup or simultaneous CPU execution.