Enumerations in Swift

OOP/enumarations.swift

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+/*
+ Enumaration - user-defined data type that consists of a group
+ of related values
+ */
+
+// Example 1
+
+enum Subjects {
+    case Maths
+    case Science
+    case Social
+    case English
+    case Hindi
+    case ComputerProgramming
+}
+
+var name: Subjects = .English
+
+switch name {
+case .English, .Hindi, .ComputerProgramming:
+    print("Elective subjects")
+case .Maths, .Science, .Social:
+    print("Compulsory subjects")
+}
+
+// Example 2
+
+enum Colors {
+    case Black
+    case Blue
+    case MidnightGray
+    case White
+    case OffWhite
+    case Silver
+}
+
+var color: Colors = .Blue
+
+if color == .Blue {
+    print("\(color) edition")
+}
+
+// RAW VALUES
+
+// Each raw value must be unique
+
+enum CarColor: Int {
+    case Black = 2
+    case Blue = 4
+    case OffWhite = 5
+    case Silver = 6
+}
+
+var colorCount = CarColor.Black.rawValue
+print("Raw value of \(CarColor.Black): \(colorCount)")
+
+enum SubjectMarks: Int {
+    case maths = 40, english, hindi, physics
+}
+
+let marks = SubjectMarks.english.rawValue
+print("Mark for \(SubjectMarks.english): \(marks)")
+
+// Initializing from a raw value
+
+enum InitEnum: String {
+    case value1 = "Enum 1"
+    case value2 = "Enum 2"
+    case value3 = "Enum 3"
+}
+
+if let result = InitEnum(rawValue: "Enum 1") {
+    print("Case '\(result)' is found for the given raw value")
+} else {
+    print("No match found")
+}