Data-Structures-Algorithm-DSA-/recursion.go at master · Anower77/Data-Structures-Algorithm-DSA- · GitHub

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package main

import "fmt"

// Countdown using recursion
func countDown(n int) {

	fmt.Println(n)

	n--

	if n > 0 {
		countDown(n)
	}
}

// Normal loop version
func sumOfNumber(n int) int {

	sum := 0

	for i := n; i >= 0; i-- {
		sum += i
	}

	return sum
}

// Recursive version
func sumOfNumberRe(n int) int {

	if n < 0 {
		return 0
	}

	return n + sumOfNumberRe(n-1)
}

func main() {

	countDown(10)

	fmt.Println("-----")

	fmt.Println(sumOfNumber(10))

	fmt.Println(sumOfNumberRe(10))
}