编辑代码

var myString = "Hello world!     -  swift.jsrun.net"
print(myString)
let indvidualScores = [75,43,103,87,12]
var teamScore = 0
for score in individualScores {
    if score > 50 {
        teamScore += 3
    } eles {
        temScore += 1
    }
}
print(teamScore)



var optionalString: String? = "Hello"
print(optionalString == nil)
var optionalName; String? = "JohnAppleseed"
var greeting = "Hello!"
if let name = optionalName {
    greeting = "Hello, \(name)"
}



let vegetable = "red pepper"
switch vegetable {
case "celery":
     print("Add some raisins and make ants on a log.")
case "cucumber", "watercress":
     print("That would make a good tea sandwich.")
case "let x where x.hasSuffix("pepper"):
 print("Is it a spicy \(x)?")
 default:
 print("Everything tastes good in soup.")
}



let interestingNumbers = [
    "Prime": [2,3,5,7,11,13],
    "Fibonacci": [1,1,2,3,5,8],
    "Square": [1,4,9,16,25],
]
var largest = 0
for (kind,numbers) in interestingNumbers {
    for number in numbers {
        if number > largest {
            largest = number
        }
    }
}
print(largest)



var n = 2
while n < 100 {
    n = n * 2
}
print(n)

var m = 2
repeat {
    m = m * 2
} while m < 100
print(total)