What does Go offer for parallel and asynchronous programming? List the main tools.

In Go, the main tools used for parallel and asynchronous programming are:

• Goroutines — lightweight threads that are started with the go keyword. They allow functions to run concurrently.

• Channels — a mechanism for exchanging data between goroutines, providing synchronization and message passing.

• sync package — contains synchronization primitives such as mutexes (Mutex), condition variables (Cond), wait groups (WaitGroup), and others.

• context package — used for managing the lifetime of goroutines, canceling operations, and passing metadata.

Example of using a goroutine and a channel:

ch := make(chan string)
go func() {
    ch <- "Hello from goroutine"
}()
msg := <-ch
fmt.Println(msg)

Thus, Go offers a simple and efficient concurrency model based on CSP (Communicating Sequential Processes).