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Swift Functions
Swift Functions – Task Units with Labels
A function in Swift is a named group of instructions that performs a particular job.Rather than duplicating code again and again, you wrap it into a function and call it whenever needed.
How to Build One
Start with func, then give it a title:
func displayMessage() {
print("Welcome aboard!")
}
Trigger it:
displayMessage() // Prints: Welcome aboard!
Passing Inputs (Arguments)
You can send data into the block:
func sayHello(to person: String) {
print("Hello, \(person)!")
}
SayHello(to: "Liam") // Output: Hello, Liam!
Returning Results
Functions can give back outcomes:
func multiply(_ x: Int, by y: Int) -> Int {
return x * y
}
Let product = multiply(4, by: 2) // product = 8
Why They Matter
- Improves structure
- Promotes reuse
- Simplifies updates
- Enables modularity
Prefer Learning by Watching?
Watch these YouTube tutorials to understand GIT Tutorial visually:
What You'll Learn:
- 📌 Swift - Functions
- 📌 How to use Functions in Swift | Swift Basics #5