Clean Code Principles Every Developer Should Know

1. Meaningful Names

Names should reveal intent. A variable named d tells you nothing; elapsedDays tells you everything.

2. Small Functions

Functions should do one thing and do it well. If a function needs a comment to explain a section, that section probably wants to be its own function.

function isEligible(user: User): boolean {
  return user.isActive && user.age >= 18;
}

3. Single Responsibility

Each module should have one reason to change. Separate your business rules from your framework and I/O.

Good code is not just about what it does, but how easy it is to understand and change.

Conclusion

Clean code is a discipline, not a destination. Small, consistent improvements compound over time.