Challenge 3 — Solution

Task: Write a function describeNumber(n int) (string, bool) that
returns "even" or "odd" as the first value, and whether n is
positive as the second (boolean) value. Call it with three different
numbers, printing both returned values each time.

package main

import "fmt"

func describeNumber(n int) (string, bool) {
	parity := "odd"
	if n%2 == 0 {
		parity = "even"
	}

	isPositive := n > 0

	return parity, isPositive
}

func main() {
	parity, positive := describeNumber(7)
	fmt.Println(parity, positive)

	parity, positive = describeNumber(-4)
	fmt.Println(parity, positive)

	parity, positive = describeNumber(0)
	fmt.Println(parity, positive)
}


Expected output:

odd true
even false
even false

Notes:
- 0 is treated as even (0 % 2 == 0 is true) and as NOT positive
  (0 > 0 is false), matching standard mathematical definitions for
  both properties.
- parity and positive are reused across all three calls with =,
  since they're already declared after the first call's :=.
- This function returns two genuinely independent pieces of
  information at once — no object or array was needed to bundle
  them together, unlike the equivalent JavaScript version would
  require.