<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>JavaScript Logical Operators</title> </head> <body> <script> var year = 2020; // Leap years are divisible by 400 or by 4 but not 100 if((year % 400 == 0) || ((year % 100 != 0) && (year % 4 == 0))){ document.write(year + " is a leap year."); } else{ document.write(year + " is not a leap year."); } </script> </body> </html>