Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How to count the number of occurrences of a character in a string in JavaScript?
To count the number of occurrences of a character in a string, try to run the following code −
Example
<!DOCTYPE html>
<html>
<body>
<script>
function displayCount() {
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 onkeypress="displayCount()" type="text" id="letter1"><br><br>
<button onclick="displayCount()">Click for Result</button><br><br>
result= <p></p>
</body>
</html>
Updated on: 17-Jun-2020
505 Views
Advertisements