How to Make a Time Delay

How to set time delay in javascript

Use setTimeout():

var delayInMilliseconds = 1000; //1 second

setTimeout(function() {
  //your code to be executed after 1 second
}, delayInMilliseconds);

If you want to do it without setTimeout: Refer to this question.

How do I make a delay in Java?

If you want to pause then use java.util.concurrent.TimeUnit:

TimeUnit.SECONDS.sleep(1);

To sleep for one second or

TimeUnit.MINUTES.sleep(1);

To sleep for a minute.

As this is a loop, this presents an inherent problem - drift. Every time you run code and then sleep you will be drifting a little bit from running, say, every second. If this is an issue then don't use sleep.

Further, sleep isn't very flexible when it comes to control.

For running a task every second or at a one second delay I would strongly recommend a ScheduledExecutorService and either scheduleAtFixedRate or scheduleWithFixedDelay.

For example, to run the method myTask every second (Java 8):

public static void main(String[] args) {
    final ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor();
    executorService.scheduleAtFixedRate(App::myTask, 0, 1, TimeUnit.SECONDS);
}

private static void myTask() {
    System.out.println("Running");
}

And in Java 7:

public static void main(String[] args) {
    final ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor();
    executorService.scheduleAtFixedRate(new Runnable() {
        @Override
        public void run() {
            myTask();
        }
    }, 0, 1, TimeUnit.SECONDS);
}

private static void myTask() {
    System.out.println("Running");
}

How do you add a timed delay to a C++ program?

In Win32:

#include<windows.h>
Sleep(milliseconds);

In Unix:

#include<unistd.h>
unsigned int microsecond = 1000000;
usleep(3 * microsecond);//sleeps for 3 second

sleep() only takes a number of seconds which is often too long.

A way to create a time delay without the use of time.sleep() in Python?

It seems that the problem is in the use of datetime.now()
Try it in this way:

from datetime import timedelta
from datetime import datetime
def _loader(s):
    while s > 0:
        t1 = datetime.now()
        t2 = timedelta(seconds=0.33)
        while 1 == 1:
            t1temp = datetime.now()
            if t1temp - t1 < t2:
                continue
            else:
                break
        print(" . ", end="")
        s = s - 1

How do I add a delay in a JavaScript loop?

The setTimeout() function is non-blocking and will return immediately. Therefore your loop will iterate very quickly and it will initiate 3-second timeout triggers one after the other in quick succession. That is why your first alerts pops up after 3 seconds, and all the rest follow in succession without any delay.

You may want to use something like this instead:

var i = 1;                  //  set your counter to 1
function myLoop() {         //  create a loop function  setTimeout(function() {   //  call a 3s setTimeout when the loop is called    console.log('hello');   //  your code here    i++;                    //  increment the counter    if (i < 10) {           //  if the counter < 10, call the loop function      myLoop();             //  ..  again which will trigger another     }                       //  ..  setTimeout()  }, 3000)}
myLoop();                   //  start the loop