What are asynchronous, parallel, and concurrent in the context of Go?

In the context of Go:

• Asynchrony — executing operations without blocking the main thread, usually through goroutines and channels. It allows launching tasks that can run independently and without waiting for their completion.

• Parallelism — the simultaneous execution of multiple tasks on different CPU cores. In Go, this is achieved through the goroutine scheduler, which distributes them across system threads.

• Concurrency — the ability of a program to manage multiple tasks that can run simultaneously or sequentially, ensuring correct access to shared resources.

Example of a goroutine:

func worker(id int) {
    fmt.Printf("Worker %d started\n", id)
    // work
}

func main() {
    for i := 1; i <= 5; i++ {
        go worker(i) // asynchronous launch
    }
    time.Sleep(time.Second) // wait for completion
}