Get Set Learn Go
Example demonstrates the various things you can do with time in Go.
When formatting time, you can use one of the format constants, or write your own using the following options:
| Type | Options |
|---|---|
| Year | 06 2006 |
| Month | 01 1 Jan January |
| Day | 02 2 _2 (width two, right justified) |
| Weekday | Mon Monday |
| Hours | 03 3 15 |
| Minutes | 04 4 |
| Seconds | 05 5 |
| ms μs ns | .000 .000000 .000000000 |
| ms μs ns | .999 .999999 .999999999 (trailing zeros removed) |
| am/pm | PM pm |
| Timezone | MST |
| Offset | -0700 -07 -07:00 Z0700 Z07:00 |
Duration represents elapsed time in nanoseconds. Keep this in mind when using duration in calculations. Convert it to the desired unit of time if needed using the functions:
func (d Duration) Hours() float64
func (d Duration) Microseconds() int64
func (d Duration) Milliseconds() int64
func (d Duration) Minutes() float64
func (d Duration) Nanoseconds() int64
func (d Duration) Seconds() float64
func main() {
/* Now() returns the current local time
in the format: 2019-10-30 17:29:02.6455037 -0500 CDT m=+0.004001001 */
now := time.Now()
fmt.Println(now)
// parse time
date := "November 28, 2019 5:00 PM CST"
dateFormat := "January 2, 2006 3:04 PM MST"
t, _ := time.Parse(dateFormat, date)
fmt.Println(t)
// format time using 'RFC822' predefined format
formattedTime := t.Format(time.RFC822)
fmt.Println(formattedTime)
// Add 1 year to the current time
later := now.AddDate(1, 0, 0)
fmt.Println(later)
// Subtract 1 month from current date
past := now.AddDate(0, -1, 0)
fmt.Println(past)
// Add 1 day to current time
later = now.AddDate(0, 0, 1)
fmt.Println(later)
// Add 5 hours to the current time
later = now.Add(5 * time.Hour)
fmt.Println(later)
// Subtract 30 minutes to the current time
past = now.Add(-30 * time.Minute)
fmt.Println(past)
// Add 30 seconds to the current time
later = now.Add(30 * time.Second)
fmt.Println(later)
// Print different parts of the date
fmt.Println(now.Year())
fmt.Println(now.Month())
fmt.Println(now.Day())
fmt.Println(now.Hour())
fmt.Println(now.Minute())
fmt.Println(now.Second())
fmt.Println(now.Zone())
// wait 2 seconds
time.Sleep(2 * time.Second)
/* calculate the duration
Since() returns the time elapsed*/
duration := time.Since(now)
fmt.Println(duration)
/* The unit of time for duration
is nanoseconds by default */
fmt.Println(int64(duration)) // nanoseconds by default
// convert duration to a different unit of time
fmt.Println(duration.Microseconds()) // get duration in microseconds
fmt.Println(duration.Milliseconds()) // get duration in milliseconds
}
2019-11-01 13:33:05.447554 -0500 CDT m=+0.003996301
2019-11-28 17:00:00 -0600 CST
28 Nov 19 17:00 CST
2020-11-01 13:33:05.447554 -0600 CST
2019-10-01 13:33:05.447554 -0500 CDT
2019-11-02 13:33:05.447554 -0500 CDT
2019-11-01 18:33:05.447554 -0500 CDT m=+18000.003996301
2019-11-01 13:03:05.447554 -0500 CDT m=-1799.996003699
2019-11-01 13:33:35.447554 -0500 CDT m=+30.003996301
2019
November
1
13
33
5
CDT -18000
2.0040004s
2004000400
2004000
2004
| Try It Out | Source Code |
| « Home Page | Next » Concurrency |