Triangular Numbers by Upali Jinatissa

Upali Jinatissa Apr 15, 2012

Abstract

Triangular Numbers

Description

You can find an any Triangular Number

Code Snippet

<html> <head> <title>loop</title> <script = "javascript">  function mul() { var b = ""; var c = eval(document.getElementById("txt").value); for(var a=1; a<=c; a++) { for(var d=1; d<=a; d++) { b +="o" ; } b += "" + "<br>"; } document.getElementById("box").innerHTML= "<br>"+ "<br>"+c + "  triangular number =   " +  (c*(c+1)/2) + "<br>" + "<br>"+b ;  } </script> </head> <body> <h1>Triangular Numbers</h1> <input type="text" id="txt" value= 2> <input type = "button" value="triangular number" onclick="mul()"> <span id="box" style="font-size:20; color:blue"></span> </body> </html>

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