Error Handling in C Programming Explained — errno, Return Values & Best Practices

In this video, we explore Error Handling in C Programming — one of the most essential but often overlooked areas of software development.
Unlike languages such as Java or C++, C doesn’t provide built-in exception handling, but it offers powerful low-level mechanisms through return values, errno, and error-handling design patterns.

You’ll learn how to detect, analyze, and respond to runtime errors efficiently — turning potential program crashes into well-managed recovery paths.

👉 What You’ll Learn:

How error handling works in C without exceptions

Using return values and errno for detecting runtime issues

Understanding common errno codes and their meanings

Writing robust error-handling patterns for maintainable C programs

Real examples of error detection with file operations and errno

Advanced error-handling patterns:

Function Split

Guard Clause

Samurai Principle

Goto Error Handling

Cleanup Record

Object-Based Error Handling

💻 Practical Example:
See how C sets and reports errors through errno when attempting to open a non-existent file — and how to use return values to respond safely.

💡 Key Takeaway:
While C lacks high-level exception handling, you can still write safe and reliable programs using a disciplined approach with errno, return codes, and structured cleanup logic.
These techniques make your C programs robust, maintainable, and production-ready.

This video is perfect for students, beginner programmers, and system developers who want to write professional-level C code that handles errors gracefully.

👍 Don’t forget to Like, Subscribe, and Comment if you found this helpful — and keep learning advanced C programming with me!



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