How to use the time function in Go language to calculate the time difference and format the output?

How to use the time function in Go language to calculate the time difference and format the output?

Go language provides a set of powerful time functions to operate and calculate time. In many applications, we often need to calculate the time difference and output it in a specific format. This article will introduce how to use the time function in the Go language to calculate the time difference and format the output.

First, we need to import the time package:

import "time"

Next, we can use the time.Now() function to get the current time:

currentTime := time.Now()

If we want To calculate the time difference, we can use the Sub() function, which accepts a parameter of type time.Time and returns a difference value of type Duration:

startTime := time.Date(2021, time.October, 1, 12, 0, 0, 0, time.UTC)
duration := currentTime.Sub(startTime)

Now we can use variables of type Duration to obtain various parts of the time difference (Such as days, hours, minutes, seconds, etc.):

days := duration.Hours() / 24
hours := duration.Hours() - (days * 24)
minutes := duration.Minutes() - (days * 24 * 60) - (hours * 60)
seconds := duration.Seconds() - (days * 24 * 60 * 60) - (hours * 60 * 60) - (minutes * 60)

Finally, we can use the Printf function to format the output time difference:

fmt.Printf("时间差: %d天 %d小时 %d分钟 %d秒
", int(days), int(hours), int(minutes), int(seconds))

The following is the complete sample code:

package main

import (
    "fmt"
    "time"
)

func main() {
    currentTime := time.Now()
    startTime := time.Date(2021, time.October, 1, 12, 0, 0, 0, time.UTC)
    duration := currentTime.Sub(startTime)

    days := duration.Hours() / 24
    hours := duration.Hours() - (days * 24)
    minutes := duration.Minutes() - (days * 24 * 60) - (hours * 60)
    seconds := duration.Seconds() - (days * 24 * 60 * 60) - (hours * 60 * 60) - (minutes * 60)

    fmt.Printf("时间差: %d天 %d小时 %d分钟 %d秒
", int(days), int(hours), int(minutes), int(seconds))
}

Run the above code and the time difference between the current time and 12:00 on October 1, 2021 will be output.

Summary: The time function in the Go language provides a convenient way to calculate the time difference and format the output. You can obtain the current time and convert the time difference into a Duration type, then use related methods to obtain various parts of the time difference, and finally format the output.

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