Code without any concurrent execution

noconcurrency.go

package main

import (
	"fmt"
	"time"
)

func main() {
	my_sleep_func()
	fmt.Println("Control doesnt reach here till my_sleep_func finishes executing")
	
}

func my_sleep_func() {
	//sleeps for 5 seconds
	time.Sleep(5 * time.Second)
	fmt.Println("My func out of sleep")
}