Booleans and Conditionals

Booleans and Conditionals

Booleans are Swift's way of representing true or false values. They're essential for making decisions in your code.

The if/else if/else structure lets you execute different code based on conditions:

let temperature = 75

if temperature > 80 {
    print("It's hot outside!")
} else if temperature > 60 {
    print("It's nice weather.")
} else {
    print("It's chilly.")

Swift's switch statement is incredibly powerful with pattern matching. It can handle ranges, tuples, and complex patterns:

let grade = 85

switch grade {
case 90...100:
    print("Excellent")
case 80..<90:
    print("Good")
case 70..<80:
    print("Average")
default:
    print("Needs improvement")

Use guard for early exits when you need to check conditions before proceeding. The ternary operator condition ? valueIfTrue : valueIfFalse provides a concise way to choose between two values.

Logical operators combine conditions: && for AND, || for OR, and ! for NOT.