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Find Number of Vowels in a String in JavaScript | Count Vowels in String using JavaScript

Feb 27, 2013
Introduction

Here I will explain how to find number of vowels in a string in JavaScript or get vowels count in string in JavaScript.

Description:
  
In previous posts I explained many articles relating to JavaScript,
JQuery. Now I will explain how to find number of vowels in a string in JavaScript.

To get number of vowels in string using JavaScript we need to write the code like as shown below


<html>
<head>
<title>find number of vowels in a string in JavaScript</title>
<script type="text/javascript">
function GetVowels() {
var str = document.getElementById('txtname').value;
var count = 0, total_vowels="";
for (var i = 0; i < str.length; i++) {
if (str.charAt(i).match(/[a-zA-Z]/) != null) {
// findVowels
if (str.charAt(i).match(/[aeiouAEIOU]/))
{
total_vowels = total_vowels + str.charAt(i);
count++;
}
}
}
document.getElementById('vowels').value = total_vowels;
document.getElementById('vcount').value = count;
}
</script>
</head>
<body>
<div >
<table border="1px" cellspacing="0" width="30%" style="background-color: #FF6600; color:White">
<tr><td colspan="2" align="center"><b>Get Vowels from String</b></td></tr>
<tr>
<td>Enter Text :</td>
<td><input type='text' id='txtname' /></td>
</tr>
<tr>
<td>Vowels Count :</td>
<td><input type='text' readonly="readonly" id='vcount'/></td>
</tr>
<tr>
<td>Total Vowels :</td>
<td><input type='text' readonly="readonly" id='vowels' /></td>
</tr>
<tr>
<td></td>
<td><input type='button' value='Get Vowels Count' onclick="javascript:GetVowels();" /></td>
</tr>
</table>
</div>
</body>
</html>
Live Demo

For live demo check below

Get Vowels from String
Enter Text :
Vowels Count :
Total Vowels :

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