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Challenge 22: Check Leap Year

Write a function that checks if a given year is a leap year.

Write a function called isLeapYear that takes year in its parameter and returns true or false.

Answer

// Function to check leap year
function isLeapYear(year) {
  // Gregorian calendar rule to check leap year
  if ((year % 4 === 0 && year % 100 !== 0) || year % 400 === 0) {
    return true;
  }

  return false;
}

Answer Explanation

The isLeapYear function takes year as input and check condition for leap year. if condition is satisfied returns true otherwise false.