5 Tasks | addition, subtraction, and multiplication| Add validation in JavaScript |keyup event so results update live as the user types|styled HTML output (e.g., colored text showing the result) |a mini project “Student Result Checker” where you send name and marks through AJAX to result.php, calculate grade (A, B, C, Fail)
Addition, Subtraction & Multiplication combined.
Ensures fields are not empty and contain only numbers.
No button. Results update as you type.
Fetches colored and formatted HTML from server.
Student Grade calculation (A, B, C, Fail).