Showing posts with label area of the circle in js. Show all posts
Showing posts with label area of the circle in js. Show all posts

Sunday, December 11, 2016

Area of the Circle Solver in JavaScript

In this article I would like to a share with you guys a simple program that will ask the use give the area of the circle and then our program will compute the area of the circle using JavaScript as our programming language.

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Sample Program Output


Program Listing


<html>
<title> Area of a Circle Solver 1.0
</title>
<body bgcolor="lightgreen">
<font color="red" face="Arial" size="5">
<center>
<br>
Area of a Circle Solver 1.0   
<br>
</center>
</font>
<style type="text/css">
.labelText {
 text-align : right;
 padding-right : 3px;
 color   : red;
 font-family:"Arial";
 font-size    : 18px;
}
</style>

 <form  name="circle" method="post">
<table>
<tr>
<tr>
 <td> &nbsp; </td>
 </tr>
<td class="labelText">  What is the area of the circle

</td>
<td> <input type="text" name="area"  size="10"/> </td>
</tr>

 <tr>
 <td> &nbsp; </td>
 </tr>
</td>
<tr>
<td class="labelText">
The result is
</td>
<td> 
<input type="text" name="display"  size="50"/> </td>
 </tr>
  <tr>
 <td> &nbsp; </td>
 </tr>
</td>                   
<td> <input type="button" value="Compute" 
title="Click here to compute the area of the circle."
 onClick="compute1()">
</td> 
<td> <input type="button" value="Clear" 
title="Click here to clear the text box."
 onClick="clear_all()">
</td> 
 
</table>
</font>
</form>
<script language ="javascript">
function compute1()
{
var xval1, solve1,final_result;
var result;
  
value1 = parseInt(document.circle.area.value);
              
solve1 = (3.14159 * value1 * value1);
// For two decimal places convertion
final_result = Math.round(solve1 * 100) /100;

result = value1 + " radius is equivalent to " 
               + final_result + " area of the circle. ";

document.circle.display.value = result;
}

function clear_all()
{
document.circle.area.value = "";
document.circle.display.value = "";
document.circle.area.focus(); 
}
</script>
</body>
</html>