swift 的if语句，switch语句，元组，函数

概述swift if语句，switch语句，元组，函数 //// main.swift// L00flow//// Created by hins on 16/10/26.// Copyright © 2016年 hins. All rights reserved.//import Foundationprint("Hello, World!")var str = "H

swift if语句，switch语句，元组，函数

////  main.swift//  L00flow////  Created by hins on 16/10/26.//  copyright © 2016年 hins. All rights reserved.//import Foundationprint("Hello,World!")var str = "Hello";for(var i=0;i<5;i=i+1){    print(i)}//流程控制//=======if语句for i in 1...10{    if(i%2==0){        print(i);    }    if(i != 3){        print("ccccc")    }    if(i>5 && i<=7){        print("jjjj")    }else{        print("ttttt")    }}//========switch语句var index = 3;switch (index){case 1 :        print(index);        break;case 2 :    print(index);    break;case 3 :    print(index);    break;default:    break;    }//=============switch语句var valChar = "bc";switch (valChar){case "a" :    print(valChar);    break;case "b" :    print(valChar);    break;case "bc" :    print(valChar);    break;default:    break;    }//==========元组（区间）let somePoint = (1,1)switch somePoint {case (0,0):    print("(0,0) is at the origin")case (_,0):    print("(\(somePoint.0),0) is on the x-axis")case (0,_):    print("(0,\(somePoint.1)) is on the y-axis")case (-2...2,-2...2):    print("(\(somePoint.0),\(somePoint.1)) is insIDe the Box")default:    print("(\(somePoint.0),\(somePoint.1)) is outsIDe of the Box")}// prints "(1,1) is insIDe the Box"//============函数//无返回值func getString(name:String){    print("wwwwww,\(name)")}//调用getString("xuan");//有返回值func getValueBB(name:String,age:Int) -> String {    print(name);    return name;}//调用 (有些参数提示要带标签 如：age:23,否则报错)var a2 = getValueBB("nununu",age:23);print(a2)func getNums() -> (Int,Int){    print("hello");    return (2,3);}//调用let (a,b) = getNums();print(b);var fun22 = getValueBB;//函数赋值给变量_ = fun22("test",age:45);//_ 下划线表示不接收返回值//函数闭包 （函数中包含函数）func namefunc(){    print("函数里面有一个函数");    func namefunc333(){        print("hahaha")    }}

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