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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, Dec 2022 compared to a year ago:

`
Rank Change Language Share Trend
1 Python 28.34 % -1.0 %
2 Java 16.93 % -0.8%
3 Javascript 9.28 % +0.3%
4 C# 6.89 % -0.3%
5 C/C++ 6.64 % -0.3 %
6 PHP 5.19 % -1.0 %
7 R 3.98 % -0.1%
8 up arrow TypeScript 2.79 % +1.1%
9 up arrow Swift 2.23 % +0.6%
10 down arrow Objective-C 2.22% +0.1%
11 down arrow Go2.02% +0.7%
12 up arrow Rust 1.78 % +0.8%
13 down arrow Kotlin 1.71 % -0.0%
14 down arrow Matlab 1.61 % +0.0%
15 up arrow Ruby 1.12% +0.2%
16 down arrow VBA 1.08 % -0.1 %
17 Ada 0.96 % +0.2 %
18 up arrow Dart 0.85 % +0.4 %
19 down arrow Scala 0.69 % -0.0 %
20 up arrow Lua 0.65 % +0.3 %
21 down arrow Visual Basic 0.57 % -0.1 %
22 down arrow Abap 0.55 % +0.1 %
23 down arrow Perl 0.53 % +0.1 %
24 Groovy 0.36 % +0.0 %
25 Cobol 0.33 % +0.0 %
26 Haskell 0.25 % +0.0 %
27 up arrow Julia 0.24 % +0.0 %
28 down arrow Delphi/Pascal 0.2 % -0.0 %

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

TIOBE Index for December 2022

Dec 2022 Dec 2021 Change Programming Language Ratings Change
1 1 Python 16.66% +3.76%
2 2 C 16.56% +4.77%
3 4 up arrow C++ 11.94% +4.21%
4 3 down arrow Java 11.82% +1.70%
5 5 C# 4.92% -1.48%
6 6 Visual Basic 3.94% -1.46%
7 7 JavaScript 3.19% +0.90%
8 9 up arrow SQL 2.22% +0.43%
9 8 down arrow Assembly language 1.87% -0.38%
10 12 up arrow PHP 1.62% +0.12%
11 11 R 1.25% -0.34%
12 19 up arrow Go 1.15% +0.20%
13 13 Classic Visual Basic 1.15% -0.13%
14 20 up arrow MATLAB 0.95% +0.03
15 10 down arrow Swift 0.91% -0.86%
16 16 Delphi/Object Pascal 0.85% -0.30%
17 15 down arrow Ruby 0.81% -0.35%
18 18 Perl 0.78% -0.18%
19 29 up arrow Objective-C 0.71% +0.29%
20 27 up arrow Rust 0.68% +0.23%

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.]



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JavaScript: Tips of the Day

Shorten an array using its length property

A great way of shortening an array is by redefining its length property.

let array = [0, 1, 2, 3, 4, 5, 6, 6, 8, 9]
array.length = 4
// Result: [0, 1, 2, 3]

Important to know though is that this is a destructive way of changing the array. This means you lose all the other values that used to be in the array.

Ref: https://bit.ly/2LBj213