What is Data Types in swift?
In Swift, data types are used to specify the type of data that a variable or constant can hold. Swift is a statically-typed language, which means that you must declare the data type of a variable when you create it. Here are some of the commonly used data types in Swift:
Int: Integers, which can be either signed (positive, negative, or zero) or unsigned (positive or zero).
let age: Int = 25
let itemCount: UInt = 10
Float and Double: Floating-point numbers for representing decimal values. Float is a 32-bit floating-point number, and Double is a 64-bit floating-point number. Examples:
let pi: Float = 3.14159
let distance: Double = 10.5
Bool: Boolean values, which can be either true or false.
let isRaining: Bool = true
String: Represents a sequence of characters.
let name: String = "John"
Character: Represents a single character.
let firstLetter: Character = "A"
Array: An ordered collection of elements of the same type.
let numbers: [Int] = [1, 2, 3, 4, 5]
Dictionary: A collection of key-value pairs.
let person: [String: Any] = ["name": "Alice", "age": 30]
Set: An unordered collection of unique elements.
let uniqueNumbers: Set
Tuple: A grouping of values of different types into a single compound value.
let coordinates: (Double, Double) = (latitude: 42.3601, longitude: -71.0589)
Optional: Represents a value that may or may not exist. Optionals are used to handle situations where a value might be missing.
var optionalValue: Int? = 10
Enum: A user-defined data type that represents a group of related values.
enum Day {
case sunday, monday, tuesday, wednesday, thursday, friday, saturday
}
let today: Day = .thursday
