Summary - Channels
- Go course
- Intermediate
- Lesson 12/80
- 4 min
Combine channel concepts to write a worker.
Summary - Channels
In this section you learned channels:
- Create a channel with make(chan T) for typed communication
- Send safely with ch <- v and understand blocking
- Receive with <-ch and check status
- Buffer with buffered channels for async starts
Now you will combine these to write a worker: create a channel, start a goroutine, receive and print.
Practice Worker channel
Inside main, add a make(chan string) call and print worker done with fmt.Println.
Starter code
package main
import "fmt"
func main() {
// buraya yaz
}Sample solution
package main
import "fmt"
func main() {
ch := make(chan string)
go func() { ch <- "worker tamam" }()
fmt.Println(<-ch)
}Expected output
worker tamam
Practice Worker output
Inside main, print channel worker with fmt.Println.
Starter code
package main
import "fmt"
func main() {
// buraya yaz
}Sample solution
package main
import "fmt"
func main() {
fmt.Println("channel worker")
}Expected output
channel worker
Questions and answers
Review the lesson questions together with their answers. To test yourself, solve the lesson interactively.
1 Channel usage
Question
ch := make(chan string)
go func() {
ch <- ____
}()
msg := <-ch
Answer
ch := make(chan string)
go func() {
ch <- "ok"
}()
msg := <-chExplanation: <-ch is receive, not send.
2 Match section concepts
| Term | Meaning |
|---|---|
make(chan int) |
Creation |
ch <- v |
Send |
<-ch |
Receive |
make(chan int, n) |
Buffered |