What entity is used to transfer data between goroutines?

In Go, the entity used for passing data between goroutines is called a channel. Channels allow safe data exchange, synchronizing the execution of goroutines.

Example of using a channel:

ch := make(chan int) // create a channel for transmitting int

go func() {
    ch <- 42 // send a value into the channel
}()

value := <-ch // receive a value from the channel
fmt.Println(value) // will output 42

Channels can be buffered and unsafe, which allows flexible management of synchronization and data exchange between goroutines.