Lesson 16 / 25

Encapsulation

Understand Encapsulation as a useful part of Swift.

The essential idea

Encapsulation gives you one practical part of Swift. Start by naming the input, the change, and the expected result. This mental model matters before any syntax rule.

Run a tiny experiment

Use a minimal example. Predict what changes, run it, then explain the observed result.

// Explore Encapsulation with one focused example.
value = 0
print(value)

Output:

0

Avoid this trap

Do not memorize Encapsulation in isolation. Change one value in a small example and use feedback to correct your understanding.

Quick check

Quick check: What is a good first practice for Encapsulation?

  • Run one small focused example.
  • Memorize without testing.
  • Ignore feedback.
Answer

Run one small focused example. — Small experiments reveal cause and effect.