golangHow to return value from goroutine using channels
func main() {
c := make(chan int)
go func(a int) {
c <- a * 2
}(2)
select {
case msg := <-c:
res := msg
fmt.Println("received", res)
}
}ctrl + cfunc main() {declare | c := make(chan int)declare channel to use for return value from goroutine |
go funccall anonymous function in parallel | c <- a * 2return result from function to channel |
select {handle channel messages | case msg := <-ccheck if message is from channel |
res := msgsave returned value to | |
Usage example
package main
import "fmt"
func main() {
c := make(chan int)
go func(a int) {
c <- a * 2
}(2)
select {
case msg := <-c:
fmt.Println("received", msg)
}
}output
received 4
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