DECLARE OPTIONAL PARAMETERS FUNCTION

<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8" />
  <title>javascript optional arguments in function</title>
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.0/jquery.min.js"></script>
  <script>
    //DECLARE OPTIONAL PARAMETERS IN BELOW FUNCTION
    function myFunction(i, j) {
      i = i || 0;
      j = j || 0;

      //IN THE ABOVE LINE, (i/j) WILL BE SET EITHER TO VALUE OF (i/j) OR TO DEFAULT VALUE (0).
      alert('i : ' + i + ' j : ' + j);
    }

    //Calling to function.
    myFunction(2);
  </script>
</head>

<body>
  <h1>DECLARE OPTIONAL PARAMETERS FUNCTION</h1>
  <p> For more detail go to link
    <a href="http://www.code-sample.com/">example</a> </p>
</body>

</html>

// Add your javascript here
$(function(){
  $("h1").animate({
    "margin-left": "100px"
  }, "slow");
});

/* Put your css in here */

h1 {
  color: red;
}