What are the main principles you follow when reviewing code?

When reviewing code, I pay attention to several key aspects:

• Readability and clarity: the code should be easy to understand, with clear variable and function names.
• Adherence to coding style: following the standards and conventions accepted in the project.
• Logic and correctness: ensuring the code does what it is intended to do, without errors and bugs.
• Optimality and performance: avoiding unnecessary computations and resource usage.
• Security and error handling: verifying that errors are handled correctly and there are no vulnerabilities.
• Testability: the code should be easily covered by tests.

Example:

// Poor
int x = 0;
if (a == true) {
    x = 1;
}

// Better
boolean isActive = a;
int status = isActive ? 1 : 0;

Thus, a review helps improve code quality and makes project maintenance easier.