1. The select statement lets a goroutine wait on multiple communication operations.
2. A select blocks until one of its cases can run, then it executes that case.
3. It chooses one at random if multiple are ready.
4. use for (infinite/finite) loop to cover multiple cases.
5. use finite for loop for quitting from for-select or dedicated channel for quit from loop.

select statement waiting on two channel

select {
	case rec1 := <-one:
		fmt.Println("rec1 from one channel, msg = ", rec1)
	case rec2 := <-two:
		fmt.Println("rec2 from two channel, msg = ", rec2)
	}

select statement with for loop to cover more than one case

for i := 0; i < 2; i++ {
		select {
		case rec1 := <-one:
			fmt.Println("rec1 from one channel, msg = ", rec1)
		case rec2 := <-two:
			fmt.Println("rec2 from two channel, msg = ", rec2)
		}
	}

quit from for-select using channel

  for {
  		select {
  		case rec1 := <-one:
  			fmt.Println("rec1 from one channel, msg = ", rec1)
  		case rec2 := <-two:
  			fmt.Println("rec2 from two channel, msg = ", rec2)
  		case q := <-quit:
  			fmt.Println("terminating message from channel = ", q)
  			return // quit for loop
  		}
  	}