Goroutines

Context

A goroutine is a lightweight thread managed by the Go runtime. You start a goroutine by prefixing a function call with the keyword go. Goroutines are cheap (kilobytes of stack) and you can run thousands concurrently.

Example

Start a goroutine that prints a message while the main function continues.

Code example

package main

import (
    "fmt"
    "time"
)

func sayHello() {
    fmt.Println("Hello from goroutine")
}

func main() {
    go sayHello()
    time.Sleep(100 * time.Millisecond) // give goroutine time to run
    fmt.Println("Hello from main")
}

Output

Hello from goroutine
Hello from main

Useful links

• Go spec: Go statements
• Go by Example: Goroutines