package main

import (
	"fmt"
	"sync"
	"sync/atomic"
)

func main() {
	var atomicCounter, nonAtomicCounter uint64
	wg := sync.WaitGroup{}

	for i := 0; i < 50; i++ {
		wg.Add(1)

		go func() { // run 50 goroutines, each goroutine increases the counter 1000 times
			for c := 0; c < 1000; c++ {
				atomic.AddUint64(&atomicCounter, 1) // increase atomic counter
				nonAtomicCounter++ // increase non-atomic counter
			}

			wg.Done()
		}()
	}

	wg.Wait() // wait until all goroutines finish
	
	fmt.Println("atomic counter value:", atomicCounter)
	fmt.Println("non atomic counter value:", nonAtomicCounter)
}

// go run counters.go 
// atomic counter value: 50000
// non atomic counter value: 30648