Strings & Interpolation

Text, and how to build it

A String is text: characters between double quotes, like "Mochi". PawWalk is full of them — dog names, walker bios, neighborhood names, error messages.

The single most-used String feature in Swift is string interpolation: put \(someValue) inside the quotes, and Swift drops the value into the text right there. It works with any value — a constant, a variable, even a calculation.

You will type \( … ) hundreds of times in this course. It's how almost every label in the PawWalk UI gets its text.