// lesson 2 of 11 · 14 min

Syntax and types

let name = "Ada"          // constant
var age = 28                 // variable
let price: Double = 29.99

print("\(name) is \(age) years old")

let for constants, var for variables -- Swift strongly favors let by default, similar to Kotlin's val.

Try it yourself

Exercise: Declare a let name and var age, then print them with string interpolation.

Expected output: open-ended — there's no single correct output here, just get your code running without errors.

swift

Output

Run your code and get it working before marking this lesson complete.

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