Master immutability with let, mutable var, type inference, and primitive scalar types.

Master Swift Unicode-compliant Strings, interpolation syntax \(value), and multiline text blocks.

Work with arithmetic, closed/half-open ranges, ternary operator, and nil-coalescing (??).

Master conditional branching, exhaustive switch with pattern matching, and guard let early exit.

Master the core feature of Swift: Optional<Wrapped>, if let, guard let, optional chaining (?.), and forced unwrapping (!).

Work with ordered Arrays, unique element Sets, and functional transformations (map, filter, reduce).

Store key-value pairs in Dictionaries ([Key: Value]) and group compound heterogeneous data with Tuples.

Iterate with for-in, while, repeat-while, schedule cleanups with defer, and control nested loops with labels.

Master argument labels, omitted labels (_), default parameter values, inout mutation, and variadic functions.

Master self-contained blocks of functionality: closure syntax, trailing closures, and $0/$1 shorthand.

Model domain states with first-class Enums, raw types (Int, String), associated values, and pattern matching.

Master error handling in Swift: Error protocol, throws, throw, try, try?, try!, and do...catch blocks.

Master the preferred Swift data structure: value types, memberwise initializers, and mutating methods.

Work with reference types: class definitions, inheritance (super.init), identity checks (===), and deinit.

Understand Swift memory management: reference counts, strong retain cycles, weak, and unowned.

Master Swift property features: stored, computed (get/set), property observers (willSet/didSet), and lazy properties.

Embrace Swift core architectural paradigm: protocols, default implementations via extensions, and CustomStringConvertible.

Write flexible, reusable, typesafe code with Generic functions, Generic types, and where clauses.

Build an end-to-end Codable JSON pipeline integrating async/await concurrency, actors, and generics.