Create a digital clock

Problem Statement -

Create a digital clock that shows the current time in HH:MM:SS format.

Example

10:57:23

10:57:24

10:57:25

10:57:26

10:57:27

The date function returns a single moment in time in a platform-independent format. There are different methods available with the Date function which we will be using to create our clock.

getHours() - This method returns the hours of date in 24hrs number format like (0 – 23).
getMinutes() - This will return the minutes of the hours in number format like from (0 – 59).
getSeconds() - This method returns the seconds of the minutes in number format like (0 – 59).
getMilliseconds() - This method returns the milliseconds of the seconds in number format like (0 – 999).

We will create a function which will be using these methods to get the current time in HH:MM:SS format.
```
  const clock = () => {
      const time = new Date(),
      hours = time.getHours(),
      minutes = time.getMinutes(),
      seconds = time.getSeconds();
    return pad(hours) + ':' + pad(minutes) + ':' + pad(seconds);
  }
```
We are using this pad() helper function which will format the input by appending 0 if the number is a single digit.
```
  const pad = (inp) => {
    return String(inp).length == 1 ? '0' + inp : inp;
  };
```
Now when we call the clock function it will return the single instance of time at the moment it was called.
```
  console.log(clock());
  //10:59:23
```
But to make it work like a clock we will need to call this function repeatedly after 1 second. For this we will use the setInterval function which repeatedly calls the function after a given interval of time.

setInterval(function() {
  console.log(clock());
}, 1000);
//10:59:23
//10:59:24
//10:59:25
//10:59:26

Happy Learning!!!.