let temperature = 36 if temperature < 10 { print(“多穿点衣服。冷”) } else if temperature >30 { print(“天气好热。记得开空调”) } else { print(“天气不错”) } //打印结果为天气好热。记得开空调let isWorkday = false let notSick = true if i
Swift基本语法01-Swift简介Swift 基本语法02-"let"和"var"Swift 基本语法03-"if let"和"guard let"Swift 基本语法05-"String"Swift 基本语法06-数组和字典 1. switch 语法简介 1>switch可以针对任意类型的值进行分支,不再局限整数 代码语言:javascript ...
If condition is evaluated to true, the code inside the body of if is executed. If condition is evaluated to false, the code inside the body of if is skipped. Note: The code inside { } is the body of the if statement. Working of if statement Example 1: if Statement let number = ...
(标识符) let a = 10 let b = 3.14 // 错误写法 // let c = a + b // let c = a * b // 正确写法 let c = Double...a : b print(result) 3、guard的使用 guard是Swift2.0新增的语法 它与if语句非常类似,它设计的目的是提高程序的可读性 guard语句必须带有else语句,它的语法如下...条件...
Those 2 albums can still have their moments to re-emerge when the time is right, if that would be something you guys would be excited about. But if it happens, it won’t be from a place of sadness and longing for what I wish I could have. It will just be a celebration now. I...
if-condition →expression|declaration else-clause → elsecode-block| elseif-statementopt Switch 语句 取决于switch语句的控制表达式(control expression),switch语句将决定执行哪一块代码。 switch语句的形式如下: 1. switch `control expression` { 2. case `pattern 1`: ...
{ifarray.isEmpty{returnnil}varcurrentMin=array[0]varcurrentMax=array[0]forvalueinarray[1..<array.count]{ifvalue<currentMin{currentMin=value}elseifvalue>currentMax{currentMax=value}}return(currentMin,currentMax)}ifletbounds=minMax(array:[8,-6,2,109,3,71]){print("最小值为 \(bounds.min)...
repeat-while 语句语法 repeat-while-statement repeat-while 语句→ repeat 代码块 while 表达式 分支语句 分支语句会根据一个或者多个条件来执行指定部分的代码。分支语句中的条件将会决定程序如何分支以及执行哪部分代码。Swift 提供三种类型的分支语句:if 语句、 guard 语句和 switch 语句。
Statement N return parameters } //函数的定义举例 func greet(person: String) -> String { let greeting = "Hello, " + person + "!" return greeting } //或 func greetAgain(person: String) -> String { return "Hello again, " + person + "!" } //函数的调用 print(greet(person: "Anna...
条件(if-else) Swift支持条件语句,如if, if..else, if..else..if, 嵌套if甚至switch语句(Python不支持)。if语句的语法非常简单: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 if boolean_expression { /* statement(s) will execute if the boolean expression is true */ } boolean_expression可以是...