An introduction to writing Swift

Lesson 1 · On the house

Hello, Swift

print and a tiny first program.

Lesson 2

Constants and variables

let vs var — prefer immutability.

Lesson 3

Types you can see

Int, Double, String, Bool — and explicit annotations.

Lesson 4

Strings worth reading

Interpolation, concatenation, and basics.

Lesson 5

Making choices

if / else — Bool conditions only.

Lesson 6

Loops that finish

for-in and while — keep an exit.

Lesson 7

Functions

Parameters, return types, and calling.

Lesson 8

Optionals

? and careful unwrap habits.

Lesson 9

Collections

Array and Dictionary basics.

Lesson 10

Structs

Value types — properties and methods.