How is asynchrony implemented in Go?

In Go, asynchrony is implemented using goroutines — lightweight threads that are started with the keyword go. A goroutine can be launched to execute a function concurrently with the main thread.

Channels are used for synchronization and data exchange between goroutines, allowing safe data transfer and coordination.

Example:

package main

import (
    "fmt"
    "time"
)

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

func main() {
    go sayHello() // start a goroutine
    time.Sleep(time.Second) // wait for the goroutine to finish
    fmt.Println("Main function finished")
}

Thus, goroutines allow writing asynchronous code simply and efficiently, without worrying about low-level thread management.