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Features
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Programs
Playground
Day 20 — Error handling & opti...
-- choose --
Day 23 — Generics advanced & a...
Day 15 — Closures basics
Day 16 — Higher-order function...
Day 17 — Generics
Day 18 — Protocols & extension...
Day 19 — Property observers &...
Day 20 — Error handling & opti...
Day 21 — Asynchronous basics
Day 22 — Optionals advanced pa...
Day 14 — Review + mini project
Day 24 — Performance considera...
Day 25 — Working with JSON
Day 26 — File I/O (basic)
Day 27 — Testing & debugging b...
Day 28 — Design a CLI mini-pro...
Day 29 — Implement the mini-pr...
Day 30 — Review & next steps t...
Hello World
Day 13 — Classes & reference s...
Day 12 — Structs
Day 11 — Enumerations
Day 10 — Optionals
Day 9 — Dictionaries & Sets
Day 8 — Arrays
Day 7 — Review / small project
Day 6 — Functions basics
Day 5 — Loops: for, while, rep...
Day 4 — Control flow: if/switc...
Day 3 — Operators & precedence
Day 2 — Basic types & conversi...
Loop Example
If Else Example
Sum of Two Numbers
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▶ Run
Output
Press “Run Code” to see output...