When learning to code, one of the first things I was curious about was the difference in programming language levels. I recently did a deep dive into these different levels and put together this comprehensive guide with useful and interesting information. One thing to point out is that the definitions of the various programming language levels have changed as programming languages have evolved, but I’ll expand on that later.
One way to think of the difference in these abstraction levels is as follows:
Each statement written in low-level languages corresponds to a single instruction for the computer. On the other hand, each statement written in high-level languages corresponds to multiple instructions for the computer. For the sake of this post, the more instructions per coding statement that a language is capable of, the higher its level.
Also, if a programming language is low-level, such as Assembly Language or machine code, then it’s easy for computers to process but difficult for people to read. Likewise, high-level languages such as Java, Python, and JavaScript are much easier for people to read but need to be compiled or interpreted before computers can process them.
Thus, low-level languages run faster and perform better than high-level languages.
These are examples of low-level programming languages.
Low-level languages have a low level of abstraction than high-level programming languages. Because of this, Low-Level code is more easily read by computers and is faster at runtime. However, although this code runs more efficiently, it’s not efficient for developers to write.
Some programming languages such as Java and Python code look more like plain English when compared to Machine Code or Assembly Language.
Machine language or machine code is the only language that computers can understand and receive instructions. These machine languages are often either binary or hexadecimal code.
Binary is a system of using only zeros and one’s to compose characters, text, and everything else that appears on a computer screen.
Although there are higher levels of programming languages than machine code, the higher-level code must first be interpreted or compiled into machine code in order for the computer to receive those instructions.
Here’s an example of binary that creates the word: hello.
01101000 //h 01100101 //e 01101100 //l 01101100 //l 01101111 //oNotice how there are 8 binary bits per letter. These 8-bit sequences are called a byte.
Additionally, when compared to a print statement with the Python language, you can see just how much easier it is for people to understand higher programming language levels.
Assembly is the closest language to Machine code.
However, assembly language gets converted into machine code by an assembler so it can pass instructions to the computer that are low enough level for the computer to understand.
It’s important to note that Assembly language is a general term for the low-level programming language that communicates with a computer’s hardware.
This means that the assembly language is different depending on the computer that it’s running on. In fact, there are many different types of assembly language but the four main types are CISC, RISC, VLIW, and DSP.
These are all examples of high-level programming languages.
High-level languages have a higher level of abstraction than low-level languages. They also tend to be much closer to spoken languages such as English. Because of this, high-level languages make it easy for programmers to read and write code.
However, that code will not run as fast as the same program written in a low-level language because it must first be interpreted or compiled into machine code.
Java has been one of the most popular high-level programming languages in the world for some time. What makes Java so popular is that it’s a high-performance language with a large library and medium difficulty to learn and use.
However, although Java is more performant than Python, it’s still not as easy to learn and use as Python in most cases. Typically, you could take a Java program and rewrite it with Python using less code.
These are good indicators that Python is higher level than Java.
Python is another extremely popular high-level programming language. The reason behind Python’s rise to stardom lies in its performance, versatility, and beginner-friendly syntax.
In fact, when compared to other programming languages, Python reads closer to English than most. Let’s take a look at a quick Python example:
name = 'Tim' print('Hello, ' + name)The first line of code creates a variable called “name” containing the text “Tim”. The second line prints a simple variable using the new message: Hello, Tim.
C language is an example of a middle-level programming language.
Some developers believe that high-level programming languages should be further divided to represent a middle level.
For instance, C has characteristics of both high-level and low-level languages.
Therefore, the distinction is often made for a middle programming language level.
C is both a high-level programming language and a middle-level programming language.
To clarify, C has always been known as a high-level language.
However, after higher-level languages such as Python have appeared, many developers believe it’s fitting to categorize C as a middle-level language.
Very High-Level Language (VHLL) was a term that was used in the 1990s to describe languages such as Python, Perl, Ruby, and Visual Basic.
Today, these are simply known as high-level languages while C can reasonably be thought of as a middle-level language.
However, these languages that were once referred to as VHLLs aren’t even the highest-level languages out there.
That is to say that other languages have a higher level of abstraction.
Currently, the highest-level programming language is Prolog. Prolog is a logic programming language used mainly in Artificial Intelligence including IBM’s Watson. The reason that Prolog is the highest-level language is that it has the highest level of abstraction.
Unlike other high-level languages, Prolog doesn’t set instructions and then translate them into machine code. Rather, it sets programming logic using facts and rules that the computer must follow when commands are made, leaving the computer to determine the specific instructions.
I asked this question on Reddit and this was one of the top responses:
Let’s look at an example of Prolog:
?- tim(male). /* this is a query asking if i'm a male */The query above is asking if I (Tim) am a male.
As long as there is logic stating that I am a male then the query will return a value of true. Of course, this is a very basic example and doesn’t showcase the language’s level of abstraction as well as a larger program. However, it does give an idea of the simple syntax and readability.
The lowest level programming language is machine language which provides little to no abstraction from the computer’s architecture. Machine code can be either binary or hexadecimal.
Machine code is a native computer language which means machine code is the language that computers speak. Because of this, machine language has the highest level of performance.
However, it isn’t practical to create applications by writing computer code. That’s why we have the need for high-level languages that can eventually be translated into machine code with some loss of performance.
Tim Statler is a Computer Science student at Governors State University and the creator of Comp Sci Central. He lives in Crete, IL with his wife, Stefanie, and their cats, Beyoncé and Monte. When he's not studying or writing for Comp Sci Central, he's probably just hanging out or making some delicious food.
Python is my favorite programming language so I wanted to know, "Is Python a High-Level Language?" I did a little bit of research to find out for myself and here is what I learned. Is Python a.
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