The Art of Readable Code

Code is written once and read dozens of times — by your teammates, your future self, and the AI assistant you're inevitably going to ask for help. Readability isn't a nice-to-have; it's a core engineering skill.

Naming is everything

The most impactful thing you can do for readability is choose good names. Good names are:

• Specific — getUserById beats getUser, which beats get
• Honest — a function named calculateTotal shouldn't have side effects
• Proportional to scope — a loop counter can be i; a module-level variable should not be

Small functions

A function should do one thing. If you can't describe what it does in one sentence without using "and", it should be split up.

// Hard to reason about
function processOrder(order: Order) {
  validateOrder(order);
  applyDiscounts(order);
  calculateTax(order);
  chargeCard(order);
  sendConfirmationEmail(order);
}

// Better: each step is isolated, testable, and named
const pipeline = [
  validateOrder,
  applyDiscounts,
  calculateTax,
  chargeCard,
  sendConfirmationEmail,
];

pipeline.forEach(step => step(order));

Comments explain why, not what

Don't explain what the code does — the code already does that. Explain why it does it.

// Bad
// Add 1 to the count
count += 1;

// Good
// The API is 1-indexed, so we offset before sending
count += 1;

Consistency over cleverness

A codebase where every developer has the same style — even if it's not your preferred style — is far more readable than one where each file feels like a different author's essay.

This is why linters, formatters, and code reviews exist.

Conclusion

Readable code is an act of empathy. Write it as if the person reading it at 2am trying to fix a production bug has never seen your codebase before. Because they might not have.