3. var numArr = [10, 20, 30, 40] // sums to value = 100. var sum = numArr.reduce (function(a, b) {return a+b;}) Connect and share knowledge within a single location that is structured and easy to search. It is often used when we want to store list of elements and access them by a single variable. Month Array See the Pen JavaScript - Get the number of days in a month-date-ex- 3 by w3resource (@w3resource) on CodePen. 'use strict'; (function (d) { var mL = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December']; var mS = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'June', 'July', 'Aug', 'Sept', 'Oct', 'Nov', 'Dec']; d. The first element in the array represents a start date. This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL) If you're a JavaScript developer and want to improve your coding, then you should be familiar with the most commonly used ES5 and ES6+ array methods. Learn more The concat() function does not change the existing arrays but returns a new array containing the values of the joined arrays. Javascript In this tutorial we will be creating an array of Dates between a start date and an end date using JavaScript. Improve this sample solution and post your code through Disqus. We can calculate the month difference between 2 dates, then get the month difference based on the year difference.

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