Can you explain how channels work in the system?

In Go, channels are a mechanism for passing data between goroutines, providing synchronization and message exchange.

A channel is created using make(chan Type) and can be buffered or unbuffered.

Main features:

• Sending to a channel blocks the sender if the channel is full (for buffered channels) or if there is no receiver (for unbuffered channels).
• Receiving from a channel blocks the receiver if the channel is empty.
• This allows safe data exchange between goroutines without using mutexes.

Example:

ch := make(chan int)

// Sending
go func() {
    ch <- 42
}()

// Receiving
value := <-ch
fmt.Println(value) // Will print 42

Thus, channels simplify the organization of concurrent interactions in Go.