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JavaScript: Find out the last day of a month

JavaScript Datetime: Exercise-9 with Solution

Write a JavaScript function to get the last day of a month.

Test Data:
console.log(lastday(2014,0));
console.log(lastday(2014,1));
console.log(lastday(2014,11));
Output :
31
28
31

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Find out the last day of a month</title>
</head>
<body>
</body>
</html>

JavaScript Code:

var lastday = function(y,m){
return  new Date(y, m +1, 0).getDate();
}
console.log(lastday(2014,0));
console.log(lastday(2014,1));
console.log(lastday(2014,11));

Sample Output:

31
28
31

Flowchart:

Flowchart: JavaScript- Find out the last day of a month

Live Demo:

See the Pen JavaScript - Find out the last day of a month-date-ex- 9 by w3resource (@w3resource) on CodePen.


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JavaScript: Tips of the Day

Add padding to the beginning of a string

const name = 'Minta Lofton';
console.log(name.padStart(13));
console.log(name.padStart(2));

With the padStart method, we can add padding to the beginning of a string. The value passed to this method is the total length of the string together with the padding. The string "Minta Lofton" has a length of 12. name.padStart(13) inserts 1 space at the start of the string, because 12 + 1 is 13.
If the argument passed to the padStart method is smaller than the length of the array, no padding will be added.

Ref: https://bit.ly/3jFRBje