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b85bf49a35
* Fixed a typo where the commenting was wrong * optimised code * fixed a sentence structure * changed the sentence structure * updated pull request * Update SetBit.js
23 lines
814 B
JavaScript
23 lines
814 B
JavaScript
/**
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* isLeapYear :: Number -> Boolean
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*
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* Check if a year is a leap year or not. A leap year is a year which has 366 days.
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* For the extra +1 day the February month contains 29 days instead of 28 days.
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*
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* The logic behind the leap year is-
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* 1. If the year is divisible by 400 then it is a leap year.
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* 2. If it is not divisible by 400 but divisible by 100 then it is not a leap year.
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* 3. If the year is not divisible by both 400 and 100 but divisible by 4 then a leap year.
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* 4. Other cases except the describing ones are not a leap year.
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*
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* @param {number} year
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* @returns {boolean} true if this is a leap year, false otherwise.
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*/
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export const isLeapYear = (year) => {
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if (year % 400 === 0) return true
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if (year % 100 === 0) return false
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if (year % 4 === 0) return true
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return false
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}
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