Demonstrate use of defer in golang with kill sig

main.go

package main

import (
	"log"
	"os"
	"os/signal"
	"sync"
	"time"
)

func main() {
	defer func() {
		log.Println("[DEFER] we got the defer here!!!")
	}()

	signals := make(chan os.Signal, 1)
	signal.Notify(signals, os.Kill, os.Interrupt)

	go func() {
		<-signals
		log.Println("[signals] We're in here!")
		os.Exit(0)
	}()

	wg := sync.WaitGroup{}
	wg.Add(1)
	go func() {
		log.Printf("Start sleep")
		for i := 0; i < 10; i++ {
			log.Printf("[SLEEP] %v seconds", i)
			time.Sleep(1 * time.Second)
		}

		wg.Done()
	}()

	wg.Wait()
}