Leap Year Checker

Determine if a given year is a leap year using clear rules.

boolean conditionals date modulo

Write a function `is_leap_year(year)` that takes an integer `year` (e.g., 2024) and returns `True` if it is a leap year and `False` otherwise.

A year is a leap year if it is divisible by 4, except that if it is divisible by 100 it is not a leap year, unless it is also divisible by 400. For example, 2000 is a leap year, but 1900 is not.

Constraints

The input `year` is an integer between 1 and 10^9 (inclusive). No negative years or zero. The function should return a boolean value.

Example

>>> is_leap_year(2020)
True
>>> is_leap_year(1900)
False
>>> is_leap_year(2000)
True
>>> is_leap_year(2021)
False

5 points ~5 min

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Hints

Think about the divisibility rules using the modulo operator (%) and the order of checks.

If a year is not divisible by 4, it is definitely not a leap year.

Years divisible by 100 are not leap years unless they are also divisible by 400.

Test Results

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