// Chapter 21 example: a variable inside a function starts fresh on every
// call, and a variable outside any function stays between calls.
// Run with: go run exercises/21/03-counter-scope.go

package main

import "fmt"

// steps is outside every function, so all of them can see it. Outside a
// function you must write var, because := only works inside one.
var steps = 0

func counterStep() int {
	count := 0
	count = count + 1
	return count
}

func step() int {
	steps = steps + 1
	return steps
}

func main() {
	fmt.Println(counterStep()) // 1
	fmt.Println(counterStep()) // 1
	fmt.Println(counterStep()) // 1

	fmt.Println(step()) // 1
	fmt.Println(step()) // 2
	fmt.Println(step()) // 3
}