What operations are available for data transfer channels?

In Go, channels are used for data transfer between goroutines and provide synchronization. Main operations with channels:

• Sending data: ch <- value — sends a value into the channel.
• Receiving data: value := <-ch — receives a value from the channel.
• Closing the channel: close(ch) — closes the channel, after which no more data can be sent, but remaining data can be read.
• Checking if the channel is closed during read: value, ok := <-ch — if ok is false, the channel is closed and no more data is available.

Example:

ch := make(chan int)
go func() {
    ch <- 42
    close(ch)
}()

value, ok := <-ch
if ok {
    fmt.Println("Received:", value)
} else {
    fmt.Println("Channel is closed")
}