Kas on lubatud saata andmeid kanalisse, mis ei ole avatud lugemiseks ja kirjutamiseks?

In Go, it is not possible to send data to a channel that is not open for writing. If the channel is closed (using close(channel)), attempting to send to it will cause a panic (runtime panic).

However, reading from a closed channel is possible — in this case, the read will return the zero value of the channel's type and a flag indicating that the channel is closed.

Example:

ch := make(chan int)
close(ch)

// Reading from a closed channel is safe
value, ok := <-ch // ok == false

// Sending to a closed channel will cause a panic
ch <- 1 // panic: send on closed channel

Therefore, data can only be sent to open channels.