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Swift Fundamentals: Variables and Constants

development ios 0 to hero full course 2026

Swift Variables & Constants

Before building UI, you must master the Swift language.

Code Snippet:

swift var playerName = "Chris" // Variable (can change) let gravity = 9.81 // Constant (immutable)

Concepts:

  • Use let by default for safety.
  • Type inference in Swift.
  • Basic data types: String, Int, Double, Bool.