Variables in Swift

Properties2

Type	Concept
Note created	Feb 17, 2025

In Swift, variable declarations are done using the var keyword.

var x = 1
x = 2

To declare constants, use let. Try to use constants as often as possible instead of variables, it is safer and allows Swift to include some optimizations in the code.

let pi = 3.14

When naming variables, you should use lower camel case (playerName). This is the expected case convention for all Swift elements except types and protocols (which use upper camel case).