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JavaScript - Exercises, Practice, Solution

What is JavaScript?

JavaScript is a cross-platform, object-oriented scripting language. It is a small and lightweight language. Inside a host environment ( a web browser), JavaScript can be connected to the objects of its environment to provide programmatic control over them.

JavaScript contains a standard library of objects, such as Array, Date, and Math, and a core set of language elements such as operators, control structures, and statements. Core JavaScript can be extended for a variety of purposes by supplementing it with additional objects.

The best way we learn anything is by practice and exercise questions. We have started this section for those (beginner to intermediate) who are familiar with JavaScript. Hope, these exercises help you to improve your JavaScript coding skills. Currently following sections are available, we are working hard to add more exercises. Happy Coding!

List of JavaScript Exercises :

More to Come !

Popularity of Programming Language
Worldwide, Jul 2022 compared to a year ago:

`
Rank Change Language Share Trend
1 Python 28.38 % -2.3 %
2 Java 17.5 % -0.7 %
3 Javascript 9.29 % +0.1 %
4 C# 7.63 % +0.5%
5 C/C++ 6.48 % -0.1 %
6 PHP 5.32 % -1.0 %
7 R 4.13 % +0.4 %
8 up arrow TypeScript 2.55 % +0.8 %
9 down arrow Objective-C 2.13 % +0.3 %
10 up arrow Swift 1.95 % +0.3 %
11 up arrow Go1.7% +0.2 %
12 Matlab 1.67 % +0.2 %
13 down arrow Kotlin 1.58 % -0.2 %
14 up arrow Rust 1.29 % +0.5 %
15 down arrow VBA 1.13 % -0.1%
16 down arrow Ruby 1.09 % -0.0 %
17 up arrow Ada 0.86 % +0.3 %
18 up arrow Scala 0.78 % +0.3 %
19 down arrow Visual Basic 0.71 % -0.0 %
20 down arrow Dart 0.64 % +0.0 %
21 down arrow Abap 0.56 % +0.0 %
22 down arrow Lua 0.53 % +0.1 %
23 Groovy 0.45 % +0.0 %
24 down arrow Julia 0.43 % +0.1 %
25 down arrow Perl 0.38 % +0.0 %
26 Cobol 0.35 % +0.0 %
27 Haskell 0.31 % +0.1 %
28 Delphi/Pascal 0.18 % +0.2 %

Source : https://pypl.github.io/PYPL.html

TIOBE Index for July 2022

July 2022 July 2021 Change Programming Language Ratings Change
1 3 up arrow Python 13.44% +2.48%
2 1 down arrow C 13.13% 1.50%
3 2 down arrow Java 11.59% +0.40%
4 4 C++ 10.00% +1.98%
5 5 C# 5.65% +0.82%
6 6 Visual Basic 4.97% +0.47%
7 7 JavaScript 1.78% -0.93%
8 9 up arrow Assembly language 1.65% -0.76%
9 10 up arrow SQL 1.64% +0.11%
10 16 up arrow Swift 1.27% +0.20%
11 8 down arrow PHP 1.20% -1.38%
12 13 up arrow Go 1.14% -0.03%
13 11 down arrow Classic Visual Basic 1.07% -0.32%
14 20 up arrow Delphi/Object Pascal 1.06% +0.21%
15 17 up arrow Ruby 0.99% +0.04%
16 21 up arrow Objective-C 0.94% +0.17%
17 18 up arrow Perl 0.78% -0.12%
18 14 down arrow Fortan 0.76% -0.36%
19 12 down arrow R 0.76% -0.57%
20 19 up arrow MATLAB 0.73% -0.15%

Source : https://www.tiobe.com/tiobe-index/

Do not submit any solution of the above exercises at here, if you want to contribute go to the appropriate exercise page.

Note : Since JavaScript is a loosely-typed, dynamic and expressive language, you may accomplish the same task in various ways. Therefore the ways (solution of the exercises) described here are not the only ways to do stuff. Rather, it would be great, if this helps you anyway to choose your own methods.

[ Want to contribute to JavaScript exercises? Send your code (attached with a .zip file) to us at w3resource[at]yahoo[dot]com. Please avoid copyrighted materials.]



JavaScript: Tips of the Day

How to insert an item into an array at a specific index (JavaScript)?

What you want is the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:

var arr = [];
arr[0] = "Jani";
arr[1] = "Hege";
arr[2] = "Stale";
arr[3] = "Kai Jim";
arr[4] = "Borge";

console.log(arr.join());
arr.splice(2, 0, "Lene");
console.log(arr.join());

Ref: https://bit.ly/2BXbp04