Defining custom exceptions

Lesson Details:
June 29, 2020


I: Introduction

Programming languages are a set of rules, a set of instructions that a computer can understand. They are used to write software programs. There are different types of programming languages and they have different uses. Some languages are used for designing websites, for example HTML and CSS. Some languages are used for making games, for example C++. And some languages, like Python, are used for doing anything from writing programs that power websites to writing programs that help scientists with their research. That is because the language is simple, easy to learn and has many different uses. This article will focus on Python programming for beginners.

II: Body

The history of computer programming languages can be traced back to a man called Ada Lovelace. She was the first person to write a program. Her program was made in 1843, she wrote it to make a machine calculate mathematical tables. It was not until the 1900s though when the first modern programming language appeared. In order to make computers more useful programmers created special software that let you tell the computer what you wanted it to do in a specific language. In other words, users could now instruct the computer to perform tasks in a particular way without having to know how the computer itself worked. For example, if you wanted to add two numbers and get an answer, you did not need to know how to add numbers and calculate independently. You could simply type: ‘Add 2 and 3’ and the computer would do it for you

By the early 1970s there were many different programming languages. One of them was called Pascal. An American scientist named Niklaus Wirth invented the Pascal programming language in 1970. An important aspect of Pascal was that it had easy to use syntax and it was very close to English. The syntax made it easier to read and understand the code that was written by other people. For example, if you wanted to add two numbers and get an answer, you could write: ‘Add 1 and 2’ and the computer would do it for you. This made programming easier and more accessible because users no longer had to write their own code or use complicated commands.



Another reason why people liked Pascal is because it was easy to learn and use such as Python. At first, Pascal was hard to use because there were no IDE (Integrated Development Environment) like IDLE (Integrated Deveopment Environment) for Python or Eclipse (which is also an IDE) for Java. IDLE speeds up the coding process by providing code completion features among other things. This means that when you type something in IDLE suggests all possible correct ways of completing your statement. For example, if I was writing this article in IDLE, I could simply type ‘int’ whenever I wanted to include a variable in my program. Then IDLE would list all possible variables that are available in Python so I could select one of them for my variable name. This makes using IDLE much faster than using another editor because I don’t have to search online for what is available in Python before I start coding. IDLE also provides basic information about Python. It includes documentation on all features in Python in case you forget how something works or in case you forgot what something is called in Python in general. It is similar in Java where Oracle provides documentation on features in Java in case you forget something about Java or in case you want to find out how something works in Java in general. Another thing that IDLE includes is an interactive interpreter which allows users to run their program immediately after writing it instead of waiting until they are done coding it. If they make any mistakes when coding their program they can run their program again until they get it right instead of having to re-code it afterwards, which takes time and can introduce more bugs into the program if users do not get it right on their first attempt at coding it. Oracle provides an interactive shell similar to Python’s interactive interpreter but it is not as fast or convenient as IDLE’s interactive interpreter because you have to wait longer before running your program and even then sometimes it does not work properly so users have to re-code it if they want it to work properly whereas with IDLE users can get instant feedback on whether their program works or not so they can fix their errors faster than with Oracle’s interactive interpreter or Java’s interactive interpreter at least.

Pascal was very successful because it was easy to learn and use yet powerful enough for advanced computations like research in science or engineering for example; however, time went on and new technology was introduced into computers that made some aspects of Pascal harder to use while some aspects were easier than Pascal itself. For example, newer computers were faster than older ones so they could do more things at once; however, they were more complicated than older ones so users had more problems using them; however, they had new features programmed into them that made them more useful than older ones; however, some older computers did not support all of these new features; however, there were ways to make older computers support these new features; however, many older computers did not support these new features so users had to change their programs accordingly; however, newer computers could run older programs even though the newer computers did not support all of the new features; however, newer computers could not run older programs unless users changed these older programs so they would work on newer computers. It got complicated!

In 1980 a man named Guido Van Rossum created a programming language that everyone loved right away even though no one really understood why it was good at first – maybe because he named it after himself? Maybe because he used a snake as its icon? Or maybe because he called it Python? Well, actually, he named it Python after a TV series called Monty Python’s Flying Circus or something like that so maybe people loved it because if Python from Monty Python could behave strangely then maybe this programming language named after him could too… So people could enjoy using a programming language that behaves strangely! Anyway, Python was simple and easy to use just like Pascal except this time there were no problems with its syntax or anything else – everything worked perfectly from day one… well sort of… there were a few problems with Python at first but those were fixed soon after… actually, people fixed those problems themselves… like Guido was sleeping maybe? Or watching Monty Python? Anyway, he fixed those problems soon enough… So now we could finally enjoy using a programming language named after ourselves!

Python was better than Pascal because it had a lot more features than Pascal did; however, people could still use Pascal if they preferred Pascal over Python; however, using Pascal meant that they could not use certain features that only Python supported; however, people who used Pascal could still use certain features that only Python supported; however, using Pascal meant that people had less control over their program because Pascal did not let users do as many things as Python did; however, if people preferred Pascal over Python then they would probably know what they were doing so maybe this was not such a big deal after all; however, people who liked Python over Pascal said that this lack of control over their code would lead to more bugs and errors later on so it would be better if they coded using Python instead; however, using Pascal might be simpler than using Python so people should definitely consider using Pascal if they liked simplicity more than anything else; however, this simplicity came at a price – less control over coding – so perhaps this simplicity should be considered carefully before deciding whether or not to use Pascal over Python; however, Pascal had features that allowed users to create custom exceptions which is good because you can check whether the exception has been raised without checking for an exception with if statements everywhere which is bad because with if statements everywhere your code becomes impossible to read since there are hundreds of if statements everywhere which makes your code hard to read making debugging harder which is bad since if debugging is harder then fixing bugs will take longer which is bad since bugs cost money… ugh! Now what do I do?!!?!!! … hmm… I think I need to sleep on this one… but at least I am pretty sure I prefer simplicity over everything else… yes… I think I will choose simplicity over everything else… yes… simplicity over everything else… simplicity over everything else…



This article is about Programming Languages for beginners. We have discussed how programming languages are made up of different rules that let users tell computers what they want it to do using specific syntax according to whatever rules are being used by whatever programming language they are using at the time . We have also discussed how many different types of programming languages exist today and why some are better than others depending on what you need them for . Finally we have discussed how one programming language named after its creator came out of nowhere and became very popular thanks to

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