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import Foundation // Hello World print("Hello, Swift!") // Variables let name = "Alice" // constant var age = 30 // variable age = 31 // String interpolation print("\(name) is \(age) years old.") // Arrays var fruits = ["apple", "banana", "cherry"] fruits.append("date") print(fruits.count) // Dictionaries var person = ["name": "Bob", "city": "London"] person["language"] = "Swift" // Optionals var email: String? = nil if let emailValue = email { print("Email: \(emailValue)") } else { print("No email provided") } // Guard statement func greet(_ name: String?) { guard let n = name else { print("No name"); return } print("Hello, \(n)!") }
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