Unlucky Years

JavaScriptHarddateslanguage_fundamentals

Instructions

Create a function which returns how many Friday 13ths there are in a given year.

howUnlucky(2020) ➞ 2

howUnlucky(2026) ➞ 3

howUnlucky(2016) ➞ 1

javascript

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⌘ ↵ to run

Walks through the solution with reasoning and edge cases.