0x00 Lesson
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")
}
0x01 我的小作品
欢迎体验我的作品之一:小编辑器-XCompiler
在线编辑器~小而巧
App Store
搜索即可~