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Count occurrence of a particular character in a string in JavaScript
In this article, we will see how to count occurrence of a particular character in a string in JavaScript. String in JavaScript is used for input/output data to the user and it is a very popular data type. Today, in this tutorial, we will write a program how we can access each element string and compare it with the particular character.
Let's take an example:
<!DOCTYPE html>
<html>
<body>
<script>
function displaystr() {
setTimeout(function() {
var str = document.getElementById('str1').value;
var letter = document.getElementById('letter1').value;
letter = letter[letter.length-1];
var lCount;
for (var i = lCount = 0; i < str.length; lCount += (str[i++] == letter));
document.querySelector('p').innerText = lCount;
return lCount;
}, 50);
}
</script>
Enter String: <input type="text" id="str1"><br><br>
Enter Letter: <input type="text" id="letter1"><br><br>
<button onclick="displaystr()">Click for Result</button><br><br>
result= <p></p>
</body>
</html>
Output:
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