print number using thread in go

package main

import (
    "fmt"
    "sync"
)

var (
    wg            sync.WaitGroup
    currentNumber = 1
    mutex         sync.Mutex
)

func printOdd() {
    defer wg.Done()

    for {
        mutex.Lock()
        if currentNumber <= 10 {
            if currentNumber%2 != 0 {
                fmt.Printf("Thread 1: %d\n", currentNumber)
                currentNumber++
            }
        } else {
            mutex.Unlock()
            break
        }
        mutex.Unlock()
    }
}

func printEven() {
    defer wg.Done()

    for {
        mutex.Lock()
        if currentNumber <= 10 {
            if currentNumber%2 == 0 {
                fmt.Printf("Thread 2: %d\n", currentNumber)
                currentNumber++
            }
        } else {
            mutex.Unlock()
            break
        }
        mutex.Unlock()
    }
}

func main() {
    wg.Add(2)
    go printOdd()
    go printEven()

    wg.Wait()
}