Swift Switch
Master conditional logic with Swift switch statements
🔀 What is Swift Switch?
Swift switch statements provide a powerful way to compare values against multiple patterns. They're safer and more expressive than traditional if-else chains, supporting pattern matching and value binding.
// Simple switch example
let grade = "A"
switch grade {
case "A":
print("Excellent!")
case "B":
print("Good job!")
default:
print("Keep trying!")
}
Output:
Excellent!
Switch Statement Features
Exact Matching
Match specific values precisely
switch number {
case 1: print("One")
case 2: print("Two")
default: print("Other")
}Range Matching
Match ranges of values
switch score {
case 90...100: print("A")
case 80..<90: print("B")
default: print("C")
}Multiple Values
Match multiple values in one case
switch day {
case "Sat", "Sun":
print("Weekend!")
default:
print("Weekday")
}Tuple Matching
Match complex data structures
switch (x, y) {
case (0, 0): print("Origin")
case (_, 0): print("X-axis")
default: print("Other")
}🔹 Basic Switch Syntax
Every switch statement must be exhaustive - covering all possible values:
let weather = "sunny"
switch weather {
case "sunny":
print("Wear sunglasses! ☀️")
case "rainy":
print("Take an umbrella! 🌧️")
case "cloudy":
print("Perfect for a walk! ☁️")
default:
print("Check the weather app!")
}Output:
Wear sunglasses! ☀️
🔹 Switch with Ranges
Use ranges to match intervals of values:
let temperature = 75
switch temperature {
case ...32:
print("Freezing! 🥶")
case 33...60:
print("Cold 🧥")
case 61...80:
print("Perfect! 😊")
case 81...:
print("Hot! 🔥")
default:
break // This will never execute
}Output:
Perfect! 😊
🔹 Switch with Where Clause
Add conditions to cases using where:
let point = (3, 4)
switch point {
case let (x, y) where x == y:
print("On the diagonal")
case let (x, y) where x > 0 && y > 0:
print("In first quadrant: (\(x), \(y))")
case let (x, y):
print("Point at (\(x), \(y))")
}Output:
In first quadrant: (3, 4)