js16.html

<!--js dialogs => 3 types
  alert dialog=> used to  display msg to users
       syn: window.alert(text/expr)
	   
  prompt dialog=> used to accept data from user 
        syn: window.prompt(text)
		
  confirm dialog=> used to cross check/confirmation from user
         syn: window.confirm(text)
	-->	 
<!--demo on js dialogs-->
<h3>demo on alert, confirm & prompt</h3>
<script>
       /* window.alert("Happy Makar sakranti");
		alert("Product is "+ 20*4);
		
		 let x=window.confirm("do want to exit?");
		 document.write(x,'<br>');
		 if(x===true)
		 closing code
		 else
		  nothing to do 
		  */
		  
		  let n=window.prompt("enter name");
		  let a=prompt("enter age","0");
		  document.write(n+" "+a+" "+"year(s) older");
		 
</script>