練習(xí)代碼:

import Foundation

//print("Hello, World!")

//1. int 型
var a : Int = 10
print("a = \(a)")

if true {
    print("真")
}
//2. Bool類型
var b : Bool = true
var isLog = false
print("\(b) isLog = \(isLog)")

//3.結(jié)構(gòu)體
struct range {
    var location : Int;
    var length : Int;
    
    
}
var r1 :range = range.init(location: 1, length: 2)
print("location = \(r1.location),length = \(r1.length)")

//4.浮點(diǎn)型
var f1 : Float = 10.344354435
print("浮點(diǎn)型:\(f1)")

var d : Double = 12.0546547564534
print("雙精度 :=\(d)")

運(yùn)行結(jié)果:

注意:
**
float類型的:小數(shù)點(diǎn)后面只有4位
double類型:小數(shù)點(diǎn)后面只有13位
**