Milan Bakotra

 <!-- JS event : onblur Execute a JavaScript when a user leaves an input field: The onblur event occurs when an object loses focus. --> Enter Name <input type = text id = "f" onblur = myfunction();> <script>     function myfunction()     {         var x = document.getElementById("f");         x.value = x.value.toUpperCase();     } </script>

 <!-- javaScript variables can hold many data types: numbers, strings, arrays, objects and more: --> <script type="text/javascript">     var n = 10; // n is number datatype     document.write(n,"<br>"); </script> <script type="text/javascript">     //strings datatype     var s = "Rohit"; // s is strings datatype     document.write(s,"<br>"); </script> <!--arrays datatype--> <p id = "demo"></p> <script>     var a = ["Bumrah", 'arrsys', 123, 12.12];     document.getElementById("demo").innerHTML = a[0]; </script> <!--object datatype --> <script type="text/javascript">     var x = {firstname:"milan", secondname:"bakotra"};//x is object     document.write(x.firstname,"  ",x.secondname, "<br>");//firstname and second name is properties </script>