Is Error Free Program Possible?

Is Error Free Program Possible?

Every beginner, developer, programmer have always wondered or have faced this question “is error free program possible?”. Although some say it is a myth to have an error free program or bug free software. But for some error free program is quality. Of course we cannot agree or disagree if an error free program is possible or not. However for many of us writing an error free program is not important, but developing a program that will solve problem is very important.

We strive for perfection and get frustrated when we don’t get something right from the start. Maybe we simply need to change our attitude, aiming for excellence rather than perfection. This goes for apps as well. You are probably asking yourself: Why does software have bugs? Is it possible to develop a 100% bug free or error free software?

error free program possible

We will see some basic terminologies related to programming.

1. What is a Program?

A program is a set of instructions that a computer can execute to perform particular task. We write program in human understandable language, but during execution computer converts the program into machine understandable language i.e. binary value. We write separate programs for computer to perform different actions.

2. What is an error?

Error is an illegal operation performed by the user which results in abnormal working of the program. Programming errors often remain undetected until the program is compiled or executed. Some of the errors inhibit the program from getting compiled or executed. Whereas some errors are not recognised during compilation or execution. Thus errors should be removed before compiling and executing.

Errors can be broadly classified into following-

3. What is a bug?

A bug is an error, flaw, failure, or fault in a computer program or software system that causes the app to produce an incorrect or unexpected result and behave in an unintended way. In a funny way bugs are called as features that are not developer by developer.

Bugs are classified as-

  1. Critical bug – A core functionality of the system fails or the system doesn’t work at all.
  2. Major bug – The defect impacts basic functionality and the system is unable to function properly.
  3. Moderate bug – The defect causes the system to generate false, inconsistent, or incomplete results.
  4. Minor bug – The defect impacts the business but only in very few cases.
  5. Cosmetic bug – The defect is only related to the interface and appearance of the application.

4. Some ways to reduce bugs or errors.

i. Review Code.

It is always a good habit to review code when we have to write multiple line code. Many a times when we review our own code we find some hidden bugs or silly errors we ignore while writing that particular code. Every professional software developer or senior developer believes that reviewing a code should be a part of serious development process. We can review code on our own or ask our colleagues, experienced seniors or team leaders to help us in the process. Github community can also help in reviewing codes or finding bugs.

ii. Keep an Eye on Compiler Warnings.

Compiler evaluates if any errors are present in our code that can occur during compilation. Every time I write code I always check or ask myself “Are there any warnings compiler wants to tell me?”. Compiler warnings actually helps us find bugs in our code. No matter how many warnings are present in the code, every warnings always has a point. Many a time we execute our programs successfully without any errors. But the code sometimes behave unusual. Thus, compiler warnings help us write better and improve our code.

iii. Focus on Development.

No matter what! Never assume that your program will never have any bugs or errors. In the modern era with developments and advancements in the systems we have to keep our code with the recent versions of the system. With any update in the system we have to check if the code is compatible with the recent version or not. If not then we need to immediately update it.

iv. Keep it Simple.

A fancy code is always a home to unwanted bugs. Yes! No matter what you do if you are not keeping it simple then it will trouble you forever. So try to keep your code as simple as possible.

v. Use Existing Libraries.

I’m sure all of you must have read “Don’t reinvent the wheel“. If there are well-tested libraries that do the same function that you’re planning to do then use those libraries. You don’t get paid to do things that someone has already done before. I think the following quote best describes my point:

The good programmers write code; great programmers steal code.

These methods will not make your code an error free program or bug free but will definitely reduce bugs and errors.


I hope I’ve answered your “is error free program possible?”. This blog will definitely clear your vision about bug free or error free code. If yes then do tell us in the comment section. Also don’t forget to share it with your friends or programming buddies and tell them error free programs are possible. If you likes this content then do follow us on instagram.

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