A channel contains values of a given type. Values can be written to a channel and read from it, and they circulate inside the channel in first-in-first-out order. There is a distinction between buffered channels, which can contain several messages, and unbuffered channels, which cannot. Channels are typically used to communicate between goroutines, but are also useful in other circumstances.
selectkeyword provides an easy method to work with channels and perform more advanced tasks. It is frequently used for a number of purposes: - Handling timeouts. - When there are multiple channels to read from, the select will randomly read from one channel which has data. - Providing an easy way to define what happens if no data is available on a channel.