Swift Structs: How Computed Properties Work and When to Use Them

Swift structs support two kinds of properties: stored properties, which hold data directly in memory, and computed properties, which recalculate their value each time they are accessed. A computed property is defined using a code block inside the struct and derives its result from other stored values rather than holding one itself. By default, computed properties are read-only, but developers can make them writable by explicitly defining both a getter and a setter within the property block. Swift automatically provides a `newValue` constant inside the setter, representing the value being assigned. The choice between stored and computed properties depends on whether the value is independent and frequently set, or derived from other properties and expected to stay dynamically accurate.