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Thursday, 30 May 2013

How To Find Number of Vowels in a String in JavaScript OR Count Vowels in String using JavaScript C# Asp.Net

How To Find Number of Vowels in a String in JavaScript OR Count Vowels in String using JavaScript C# Asp.Net


Program:

.Aspx File:

<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: #B52025; 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:

find number of vowels in a string in JavaScript
Get Vowels from String
Enter Text :
Vowels Count :
Total Vowels :

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