generator.go

package main

func gen(f int) chan int {
	// Creating non-buffered channel
	c := make(chan int)

	go func() {
		for i := 0; i < f; i++ {
			// This part of the code will be blocked until someone will read from c channel.
			c <- i
		}

		// Closing the channel at the end of the iteration
		close(c)
	}()

	// Returns current channel.
	return c
}

func main() {
	gen(10)

}