day 4

Question 1

arc4random()

Answer 1

generates a random number

Question 2

func syntax

Answer 2

func nameOfFunction() {
    // body of function goes here
}

Question 3

function type

Answer 3

func sayHelloToStudent(student: String) {
    print("Hello \(student)")
}

Question 4

multiple func paramters

Answer 4

greetStudent(student: String, school: String)

Question 5

multiple func paramters example

Answer 5

func averageScore(firstScore: Double, secondScore: Double, thirdScore: Double) {
    let totalScore = firstScore + secondScore + thirdScore
    print(totalScore / 3)
}

Question 6

To return a value from a function

Answer 6

func calculateTip(priceOfMeal: Double) -> Double {
    return priceOfMeal * 0.15
}

func isPastBedtime(hour: Int) -> Bool {
    if hour > 9 {
        return true
    } else {
        return false
    }
}

Question 7

boolean

Answer 7

var name=True
print(name)

Question 8

if true do something

Answer 8

if true{print(“hi”}

Question 9

if statement needs

Answer 9

boolean to check

Question 10

else only executes

Answer 10

if condition false

Question 11

else if

Answer 11

to add extra conditions

Question 12

else statement always

Answer 12

last statement

Question 13

user input

Answer 13

readline()

Question 14

var password=

Answer 14

readline()

Question 15

while code

Answer 15

while true{print(“hi”}

Question 16

how to specify return value

Answer 16

->Int{}

Question 17

return add

Answer 17

func add()->Int{
var number=1+1
return number
}

Question 18

end of year bonus

Answer 18

func endOfYearBonus(basePay: Double, bonus: Double,percentBonus: Double)->(Double){
    let percentBonus=0.10
    return basePay + bonus + (basePay * percentBonus)
}

Question 19

Internal and External Parameter Names

Answer 19

func addValues(value1 x: Int, value2 y: Int) -> Int {
    // internally, use `x` and `y`
    return x + y
}

// externally, use `value1` and `value2`
addValues(value1: 5, value2: 10)

Question 20

Omitting External Parameter Names example

Answer 20

func combineStrings(_ s1: String, _ s2: String) -> String {
    return s1 + s2
}

combineStrings(“We love”, “ Swift!”)