Overview of Swift

Swift is a powerful and intuitive programming language developed by Apple for iOS, macOS, watchOS, and tvOS app development. Released in 2014, Swift combines the performance of compiled languages with the simplicity of scripting languages. Learn more at Swift Official Site.

Key Features of Swift:

Type Safety: Swift enforces type safety, ensuring that variables are always used consistently, reducing errors at runtime. This feature promotes better code quality and reliability. Learn more
Optionals: Swift introduces optionals, a powerful feature that helps manage the absence of a value safely. It allows developers to define whether a variable can hold a value or not. Learn more
Closures: Swift supports closures, which are self-contained blocks of functionality that can be passed around and used in your code. This feature enhances flexibility and reusability. Learn more
Interoperability: Swift is fully interoperable with Objective-C, allowing developers to integrate Swift code into existing Objective-C projects seamlessly. Learn more
Fast and Powerful: Swift is designed to be fast and efficient, with a modern syntax that makes writing and maintaining code easier. This performance makes it suitable for both small scripts and large applications. Learn more

Basic Syntax

Here’s a simple example of Swift code:

let message = "Hello, Swift!"
    print(message)

This example demonstrates Swift's ability to handle strings and print them to the console using the print function.

Swift Examples:

Here are several examples of Swift code that demonstrate different programming concepts:

1. Basic Function

func add(a: Int, b: Int) -> Int {
        return a + b
    }
    
    print(add(5, 3)) // Output: 8

This function takes two parameters and returns their sum. Learn more

2. Class Example

class Animal {
        var name: String
    
        init(name: String) {
            self.name = name
        }
    
        func speak() -> String {
            return "\(name) makes a noise."
        }
    }
    
    let dog = Animal(name: "Dog")
    print(dog.speak()) // Output: Dog makes a noise.

This example shows how to create a class and instantiate an object in Swift. Learn more

3. Protocol Example

protocol Speak {
        func speak() -> String
    }
    
    class Person: Speak {
        func speak() -> String {
            return "Hello!"
        }
    }
    
    let person = Person()
    print(person.speak()) // Output: Hello!

Protocols define a blueprint of methods, properties, and other requirements. Classes can conform to protocols, allowing for a structured approach to code organization. Learn more

4. Conditional Statements

Conditional statements are essential in programming to execute different code paths based on conditions:

func checkAge(age: Int) -> String {
        if age >= 18 {
            return "You are an adult."
        } else {
            return "You are a minor."
        }
    }

In this example, the checkAge function determines whether a person is an adult or a minor based on the input age. Learn more

Input

Output