[By Bhoomika Saini]

If you’re new to the field of software development, the toughest part of learning programming is deciding where to begin. There are hundreds of programming languages in widespread use, each with its own complexities and idiosyncrasies. As you begin your journey as a software developer, you’ll start to discover which programming language will be most suitable for you, your interests, and your career goals.

When deciding which programming language to learn, it’s important not to get caught up in flashy trends and popularity contests. The best programming languages to learn in 2021 are likely the same ones that were best to learn in 2017 and 2018, and that will continue to be true for the next several years as well.

Although the field of computer programming changes rapidly, the languages that we’ve discussed above have a great deal of staying power. By learning one or more of these languages, you’ll be in an excellent position not only for this year but in the years to come.

In the list below, we go over the best and most in-demand programming languages for many of the most common use cases including web development, mobile development, game development, and more.

Scala

If you’re familiar with Java—a classic programming language in its own right—it’s worth checking out its modern cousin, Scala. Scala combines the best features of Java (such as its Object-Oriented Structure and its lightning-fast JVM runtime environment) with a modern twist.

As a functional programming language, Scala allows engineers to elevate the quality of their code to resemble pure math. Scala allows for concurrent programming, allowing complex procedures to be executed in parallel. Furthermore, it is a strongly typed language. Engineers can create and customize their own data types, allowing them to have the peace of mind knowing entire swaths of bugs are impossible at runtime.

Elm

One of the youngest languages on our list, what began as a Harvard student’s thesis has now grown to become a point of passion for front-end developers around the world.

Elm compiles to JavaScript, making it ideal for building fast-executing UIs with zero errors at runtime. Elm is a functional programming language, allowing developers to create client-side interfaces without the declarative trappings of HTML and CSS.

Ruby

Ruby is another scripting language that’s commonly used for web development. In particular, it’s used as the basis for the popular Ruby on Rails web application framework.

Beginners often gravitate toward Ruby because it has a reputation for having one of the friendliest and most helpful user communities. The Ruby community even has an unofficial saying, “Matz is nice and so we are nice,” encouraging members to model their kind and considerate behavior on Ruby’s chief inventor Yukihiro Matsumoto.

In addition to the active community and its straightforward syntax, Ruby is also a good language to pick up thanks to its association with great tech businesses. Twitter, Airbnb, Bloomberg, Shopify, and countless other startups have all built their websites using Ruby on Rails at some point.

C#

Like C++, C# (pronounced C Sharp) is a general-purpose, object-oriented language built on the foundations of C. It was originally designed by Microsoft as part of its .NET framework for building Windows applications.

C# uses a syntax that’s similar to other C-derived languages such as C++, so it’s easy to pick up if you’re coming from another language in the C family. C# is not only the go-to for Microsoft app development, but it’s also the language mobile developers use to build cross-platform apps on the Xamarin platform.

Additionally, anyone who is interested in VR development should consider learning C#. C# is the recommended language for building 3D and 2D video games using the popular Unity game engine, which produces one-third of the top games on the market.

HTML

What this language is used for: 

• Web documents 
• Website development 
• Website maintenance

HTML stands for Hypertext Markup Language. Don’t let the complicated-sounding name fool you, though; HTML is one of the most accessible stepping stones into the world of programming. 

Technically, HTML is a markup language, which means that it is responsible for formatting the appearance of information on a website. Essentially, HTML is used to describe web pages with ordinary text. It doesn’t have the same functionality as other programming languages in this list and is limited to creating and structuring text on a site. Sections, headings, links and paragraphs are all part of the HTML domain. 

Rust

Rust is a bit of an upstart among the other languages on this list, but that doesn’t mean it’s not a valuable language to learn. Stack Overflow’s 2020 Developer Survey found that Rust was the most loved programming language among developers for the fifth year in a row, with 86.1 percent of Rust developers saying that they want to continue working with it.

Developed by the Mozilla Corporation, Rust, like C and C++, is intended primarily for low-level systems programming. What Rust adds to the mix, however, is an emphasis on speed and security. Rust emphasizes writing “safe code” by preventing programs from accessing parts of memory that they shouldn’t, which can cause unexpected behavior and system crashes.

The advantages of Rust mean that other big tech companies, such as Dropbox and Coursera, are already starting to use it internally. While it may be a bit more difficult to master than other beginner languages, Rust programming skills are likely to pay off handsomely, as the language’s popularity will only continue to rise in the near future.

CSS

What this language is used for: 

• Web documents 
• Website development 
• Website design

CSS, or cascading style sheets, is usually applied in conjunction with HTML and governs the site’s appearance. While HTML organizes site text into chunks, CSS is responsible for determining the size, color and position of all page elements.  

CSS is convenient, too; the cascading part of the name means that an applied style will cascade down from parent elements to all children elements across the site. This feature means that once users determine aesthetics for the main parent, they won’t have to manually repeat their code across a website. Moreover, the delegation of site organization to HTML and aesthetics to CSS means that users don’t have to completely rewrite a web page just to change a color. 

CSS is an approachable language that allows beginning programmers to dip their toes in the metaphorical coding pool. If you’re new to coding, there’s no reason not to learn CSS before tackling more complex languages!

Perl

What this language is used for:

• System administration 
• GUI development 
• Network programming

Perl isn’t the most commonly used language on the market. In fact, just 3.1 percent of developers used it in 2020, and it didn’t even make Stack Overflow’s commonly used languages list for 2019. However, we are recommending it for a reason. If you’re already well into your career, learning Perl could significantly boost your earnings potential. 

Developers who know Perl tend to make 54 percent more than the average developer (PDF, 2.4MB). That said, it is worth noting that most of the people who know these are senior developers, who tend to make more at a baseline — thus, attempting to quantify the “bonus” that a programming language provides may be somewhat tricky. That said, learning a language like Perl may still make a junior developer better suited for a promotion or raise. 

The Practical Extraction and Report Language — or Perl, for short — is a scripting language that is commonly used to extract information from a text file and create a report. 

While many programming languages are compiled languages — wherein a target machine translates the program — Perl is an interpreted language, wherein a third “interpreting” machine locates the code and executes a task. Usually, interpreted programs require more CPU, but because Perl is such a concise language, it creates short scripts that can be processed quickly.