Conditions

Now you know some operators you can write conditions using if statements. You give Swift a condition, and if that condition is true it will run code of your choosing.

To try this out, I want to use a Swift function called print(): you run it with some text, and it will be printed out.

We can use conditions to check for a winning Blackjack hand:

let firstCard = 11
let secondCard = 10

if firstCard + secondCard == 21 {
    print("Blackjack!")
}

The code inside the braces – { and } – will be printed if the condition is true. If you want you can provide alternative code to run if the condition is false, using else:

if firstCard + secondCard == 21 {
    print("Blackjack!")
} else {
    print("Regular cards")
}

You can also chain conditions together using else if:

if firstCard + secondCard == 2 {
    print("Aces – lucky!")
} else if firstCard + secondCard == 21 {
    print("Blackjack!")
} else {
    print("Regular cards")
}