What is the correct JavaScript syntax to write "Hello World"?

The functions definitions in JavaScript begins with

  Which of the following can't be done with client-side JavaScript?

<script type="text/javascript">

  _____ JavaScript statements embedded in an HTML page can respond to user events such as mouse-clicks, form input, and page navigation.

 Which of the following is not a valid JavaScript variable name?

What are variables used in JavaScript Programs?

What will happen, if the following JavaScript code is executed?var count =0;  

while (count <10)  

{  

     console.log(count);  

     count++;  

}  

Which of the following is the correct output for the following JavaScript code:

var x=3;  

var y=2;  

var z=0;  

If(x==y)  

document.write(x);  

elseif(x==y)  

document.write(x);  

else  

document.write(z);  

The "function" and " var" are known as: