Golang Unix Epoch Time Retrieval

Introduction

The Epoch lab is a Golang lab that aims to test your ability to get the number of seconds, milliseconds, or nanoseconds since the Unix epoch.

Skills Graph

Epoch

The problem to be solved in this lab is to write a Golang program that can calculate the number of seconds, milliseconds, or nanoseconds since the Unix epoch.

To complete this lab, you need to have a basic understanding of Golang and the following requirements:

• Familiarity with the time package in Golang.
• Knowledge of how to use the Unix, UnixMilli, and UnixNano functions in the time package.

$ go run epoch.go
2012-10-31 16:13:58.292387 +0000 UTC
1351700038
1351700038292
1351700038292387000
2012-10-31 16:13:58 +0000 UTC
2012-10-31 16:13:58.292387 +0000 UTC

## Next we'll look at another time-related task: time
## parsing and formatting.

There is the full code below:

// A common requirement in programs is getting the number
// of seconds, milliseconds, or nanoseconds since the
// [Unix epoch](https://en.wikipedia.org/wiki/Unix_time).
// Here's how to do it in Go.

package main

import (
	"fmt"
	"time"
)

func main() {

	// Use `time.Now` with `Unix`, `UnixMilli` or `UnixNano`
	// to get elapsed time since the Unix epoch in seconds,
	// milliseconds or nanoseconds, respectively.
	now := time.Now()
	fmt.Println(now)

	fmt.Println(now.Unix())
	fmt.Println(now.UnixMilli())
	fmt.Println(now.UnixNano())

	// You can also convert integer seconds or nanoseconds
	// since the epoch into the corresponding `time`.
	fmt.Println(time.Unix(now.Unix(), 0))
	fmt.Println(time.Unix(0, now.UnixNano()))
}

Summary

The Epoch lab is a Golang lab that tests your ability to get the number of seconds, milliseconds, or nanoseconds since the Unix epoch. By completing this lab, you will gain a better understanding of the time package in Golang and how to use the Unix, UnixMilli, and UnixNano functions.