What are unbuffered channels in Go?

Can you explain what unbuffered channels are in Go?

Unbuffered channels in Go are channels that do not have any capacity to hold data. They require both the sender and receiver to be ready at the same time.

How do they differ from buffered channels?

Buffered channels can hold a specified number of values before blocking the sender. Unbuffered channels block both the sender and receiver until the data is transferred.

When would I use an unbuffered channel?

You would use an unbuffered channel when you need to synchronize the execution of goroutines, ensuring that the sender and receiver are in sync.

Can you give me a code example of using an unbuffered channel?

Sure! Here's a simple example:

ch := make(chan int)

// Sender goroutine
go func() {
    ch <- 42 // Send value
}()

// Receiver goroutine
value := <-ch // Receive value
fmt.Println(value) // Output: 42