functions

The function print, min, max, and abs are a few examples of global functions. Check out a complete list of Swift’s global functions.

print("I'm a global function!")

var initialPrice = 50
var bestOffer = 45
var finalPrice = min(bestOffer, initialPrice)

Anatomy of a function

func functionName (_ parameterName: parameterType) -> returnType {
	statements to execute
	return object
}

func sumOfStrings(_ aBunchOfStrings: [String]) -> Int {
	let array = aBunchOfStrings
	var sum = 0
	for string in array {
		if Int(string) != nil {
			let int intToAdd = Int(string)!
			sum += intToAdd
		}
	}
	return sum
}

func reverse(_ string: String) -> String {
	var reversedString = ""
	for character in string.characters {
		reversedString = "\(character)" + reversedString
	}
	return reversedString
}

func warmUp(temperature: Int) -> Int {
	return temperature + 10
}
func firstChar(word: String) -> Character {
	return word[word.startIndex]
}

func concatenate(firstString: String, secondString secondString){
	return firstString + secondString
}
func warmUp(temperature: Int) -> Int {
	return temperature + 10
}
func firstCharacter(word: String) -> Character {
	return word[word.startIndex]
}
func concatenate(firstString: String, secondString: String)-> String {
	return firstString + secondString
}