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Puzzle 13 Explanation: Go Range

Puzzle 13 Explanation: Go Range

Understand how range works in Go.

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Try it yourself

Try executing the code below to see the result for yourself.

Go (1.16.5)
package main
import (
	"fmt"
)
func fibs(n int) chan int {
	ch := make(chan int)
	go func() {
		a, b := 1, 1
		for i := 0; i < n; i++ {
			ch <- a
			a, b = b, a+b
		}
	}()
	return ch
}
func main() {
	for i := range fibs(5) {
		fmt.Printf("%d ", i)
	}
	fmt.Println()
}

Explanation

To obtain a value from a channel, we can either use the receive operator (←ch) or do a for loop with a ...