Go Systems Programming

About channels

A channel, putting it simply, is a communication mechanism that allows goroutines to exchange data. However, some rules exist here. First, each channel allows the exchange of a particular data type, which is also called the element type of the channel, and second, for a channel to operate properly, you will need to use some Go code to receive what is sent via the channel.

You should declare a new channel using the chan keyword and you can close a channel using the close() function. Additionally, as each channel has its own type, the developer should define it.

Last, a very important detail: when you are using a channel as a function parameter, you can specify its direction, that is, whether it will be used for writing or reading. ...