Many students have the perception that developers spend most of their working hours writing new code. However, in real companies, a large part of their job involves understanding code that has already been written by someone else.
Why so?
Developers may need to explore an existing application before adding a feature, fixing a bug, or improving its performance. Learning to read and understand code is therefore just as important as learning to write it.
Most Of The Softwares Aren’t Built From Scratch
In a professional environment, developers usually work on existing applications rather than building everything from the beginning. Before making any changes, they need to understand how the application is structured, how it works, how different components are connected, and how data moves through the system.
This often means reading existing code, exploring different files, and understanding how previous developers built the application, can be a major part of their work.
Reading Codes Helps Developers Fix Problems
When a bug is reported, developers cannot immediately fix it simply by writing new code. First, they need to analyse the application thoroughly, understand how different components are connected, and examine how data moves through the system to identify the root cause.
This process of reading and analysing code helps developers find the right solution to the existing problem rather than simply fixing the visible issue.
Understanding Someone Else’s Thinking
Everyone has a different style of writing code. You may not write code in the same way as your colleague because your approach to solving a problem may be different from theirs.
Before making any changes to existing code, developers need to analyse it to understand why it was written the way it was and how it fits into the rest of the application. This helps them make changes carefully without affecting features that are already working.
Reading Codes Prevent Costly Mistakes
Making changes to unfamiliar code without understanding it may lead to major problems. A small change to an application may affect all the components that depend on it.
By carefully reading and understanding the existing code first, developers can identify these connections and make changes with greater confidence. This reduces the chances of breaking features that are already working and helps maintain the overall stability of the application.
Code Reviews Are Part Of The Job
Developers also spend time reading codes written by their team-mates during code reviews. Before new code is added to an application, other developers may review it to identify errors, security issues, performance problems, or areas that could be improved.
Code reviews not only help maintain the quality of an application but also encourage developers to learn from each other's approaches and improve their own coding practices.
Reading Code Is a Skill Students Can Develop
Most students spend a considerable amount of time learning how to write code instead of learning how to read it. One way to develop this skill is by exploring open-source projects, reading GitHub repositories, or revisiting older projects and trying to understand how different parts work together.
With consistent effort and practice, students can become more comfortable navigating unfamiliar code and identifying what each part of an application does.
The Takeaway
Reading code is an important part of becoming a good developer. In a professional environment, developers need to understand existing systems, fix problems, review their teammates' work, and make changes without affecting other parts of an application.
For students, learning to read and understand code alongside writing it can build stronger problem-solving skills and prepare them for the realities of working on real-world software projects.
