javaScript html receives an entry of a character string in a text box, when a button...

javaScript

html receives an entry of a character string in a text box, when a button is clicked, the count of vowels in the string stored in the textbox is displayed. The html file contains one function: vowelcount().

vowelcount(): returns the number of uppercase and lowercase English language vowel letter that occurs in the string entry in the textbox.

//html:

<!--

YOUR ID
YOUR NAME

-->
<html>
<head>
<script>
function vowelcount()
{
/* YOUR CODE HERE */
}

</script>
</head>
<body>
<input type="text" name="numbers" id="numbers">
<input type="button" name="button" value="click" onclick="vowelcount();">
<p id="result"> </p>
</body>
</html>

Solutions

Expert Solution

Answer:

Note: Updated code highlighted in bold.

Code:

<html>
<head>
<script>
function vowelcount()
{
   //getting string from textbox
   var string = document.getElementById("numbers").value;
var listOfVowels = 'aAeEiIoOuU';
var vowelsCount = 0;
for(var i = 0; i < string.length ; i++)
   {
       //if character is matched with listOfVowels
if (listOfVowels.indexOf(string[i]) !== -1)
       {
vowelsCount += 1; //increment the count
}
}
   //Setting result to result element
   document.getElementById('result').innerHTML = "Number of Vowels: "+vowelsCount;
}

</script>
</head>
<body>
<input type="text" name="numbers" id="numbers">
<input type="button" name="button" value="click" onclick="vowelcount();">
<p id="result"></p>
</body>
</html>

Screenshot:

venereology answered 2 weeks ago

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