time.Since() Function in Golang With Examples

In Go language, time packages supplies functionality for determining as well as viewing time. The Since() function in Go language holds time value and is used to evaluate the difference with the actual time. Moreover, this function is defined under the time package. Here, you need to import the “time” package in order to use these functions.

Syntax:

func Since(t Time) Duration

Here, t is the time value.

Note: This method is shortcut for time.Now().Sub(t).

Return value: It returns a duration value.

Example 1:

// Golang program to illustrate in Golang

// Including main package
package main

// Importing fmt and time
import (
    "fmt"
    "time"
)

// Calling main
func main() {

    // Defining time value
    // of Since method
    now := time.Now()

    // Prints time elapse
    fmt.Println("time elapse:",
             time.Since(now))
}

Output:

time elapse: 210ns // Can be different at different run times

Here, time elapse between now and the current time is printed. So, it can be different at different run times.

Example 2:

// Golang program to illustrate in Golang

// Including main package
package main

// Importing fmt and time
import (
    "fmt"
    "time"
)

// Calling main
func main() {

    // Defining time value
    // of Since method
    timevalue := time.Now()

    // Calling Since method
    // with its parameter
    Duration := time.Since(timevalue)

    // Prints time elapse in nanoseconds
    fmt.Println("time elapse in nanoseconds:",
                   Duration.Nanoseconds())
}

Output:

time elapse in nanoseconds: 351 // Can be different at different run times