Run
<!DOCTYPE html> <html> <body> <script> function checkLeapYear() { // fetch the input let year=document.getElementById("year").value; //conditions to find out the leap year if ((0 == year % 4) && (0 != year % 100) || (0 == year % 400)) { document.write(year + ' is a leap year'); } else { document.write(year + ' is not a leap year'); } } </script> <form> Enter year <input type="number" id="year" /> <input type="button" value="submit" onclick="checkLeapYear()" /> </form> </body> </html>