Waiting a certain amount of time

The previous recipe describes how to execute the code periodically. This recipe will show you how to execute the code with a delay.

How to do it...

1. Open the console and create the folder chapter04/recipe10.
2. Navigate to the directory.
3. Create the delay.go file with the following content:

        package main

        import (
          "fmt"
          "sync"
          "time"
        )

        func main() {

          t := time.NewTimer(3 * time.Second)

          fmt.Printf("Start waiting at %v\n", 
                     time.Now().Format(time.UnixDate))
          <-t.C
          fmt.Printf("Code executed at %v\n", 
                     time.Now().Format(time.UnixDate))

          wg := &sync.WaitGroup{}
          wg.Add(1)
          fmt.Printf("Start waiting for AfterFunc at %v\n", 
                     time.Now().Format(time.UnixDate))
          time.AfterFunc(3*time.Second, func() {
          fmt.Printf("Code executed for AfterFunc at %v\n", 
        ...