Go Mutex

mutex.go

package main

import (
	"fmt"
	"sync"
)

var (
	mutex = sync.Mutex{}
	balance int
)

func main() {
	balance= 1000
	fmt.Println("hello")
	var wg sync.WaitGroup
	wg.Add(2)
	go widraw(700 , &wg)
	go deposit(500 , &wg)
	wg.Wait()
	fmt.Printf("final balance %d\n" , balance)

}

func widraw(i int , wg *sync.WaitGroup) {
	mutex.Lock()
	fmt.Printf("witdrawing amount %d from balance %d\n" , i , balance)
	balance -= i
	mutex.Unlock()
	wg.Done()
}

func deposit(i int , wg *sync.WaitGroup) {
	mutex.Lock()
	fmt.Printf("depositing amount %d from balanncce %d\n" , i , balance)
	balance += i
	mutex.Unlock()
	wg.Done()

}