Question

How to check leap year in JavaScript

Answer 1

const year = 2016;
                    
if (year % 400 == 0)
    console.log(year + " is a leap year");
else if (year % 100 == 0)
         console.log(year + " is not a leap year");
     else if (year % 4 == 0)
              console.log(year + " is a leap year");
          else
              console.log(year + " is not a leap year");
 



/*
run:  
 
2016 is a leap year
 
*/

 

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Answer 2

function checkLeapYear(year) {
    return (year % 4 === 0 && year % 100 !== 0) || year % 400 === 0;
}

const year = 2016;

console.log(checkLeapYear(year)); 



/*
run:  
 
true
 
*/

 

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