Go obtains the specific implementation of the time difference between two time points

now := () //Get the current time==>2019-08-21 11:30:51.2470317 +0800 CST m=+0.004501101
("Timestamp (seconds): %v;\n", ().Unix())        //10 bits("Timestamp (nanosecond): %v;\n",().UnixNano())    //19 bits("Timestamp (milliseconds): %v;\n",().UnixNano() / 1e6)        //or 1000 seconds can also be("Timestamp (nanoseconds-->seconds): %v;\n",().UnixNano() / 1e9)

TimeLocation, err := ("Asia/Shanghai")
//err processing().In(TimeLocation).Format()

package main

import (
    "fmt"
    "time"
)

func main() {
    temp := 0
    t1 := ()
    for i := 0; i < 100000; i++ {
        for j := 0; j < 10000; j++ {
            temp++
        }
    }
    (temp)
    t2 := ()
    ((t1))

}

// Get the time 50 seconds ago, method 1st,_ := ("-50s")
("50 seconds ago:",().Add(st))
 
// Get the time 1 minute ago, n seconds ago is * -n, method 2t := ().Add( * -1) 
("One minute ago:",t)
 
//Get the time 1 hour agosth,_ := ("-1h")
("1 hour ago:",().Add(sth))
 
// Get the time 2 days agooldTime := ().AddDate(0, 0, -2)
 
//Get the time two months agooldTime := ().AddDate(0, -2, 0)

// Get the time after 50 seconds, method 1st,_ := ("50s")
("Time after 50 seconds:",().Add(st))
 
// Get the time after 1 minute, n seconds before * n, method 2t := ().Add( * 1) 
("Time in one minute:",t)
 
//Get the time after 1 hoursth,_ := ("1h")
("Time after 1 hour:",().Add(sth))
 
// Get the time after the current time 2 daysnewTime := ().AddDate(0, 0, 2)
//The result of newTime is time type 
//Get the current time after 2 monthsnewTime := ().AddDate(0, 2, 0)