SWIF Basic Syntax 01

Import Foundation

/**

* 1, the first Swift program

*/

println ("Hello, world!")

/**

* 2, define constants

*/

Let a =10

Let Cinteger:double =12.00

/**

* 3, define Variables

*/

var b =0

b =11

var bfloat:float

Bfloat = 11.0

println (a)

/**

* 4, type conversion (concatenation of strings)

*/

Let label = "the width is"

Let width =94

Let Widthlabel =label + String (width)

Concatenation of strings

Let WidthLabel1 = "\ (label) \ (width)"

println (Widthlabel)

println ("type conversion: \ (WIDTHLABEL1)")

/**

* 5, define Array

*/

var array = ["hehe", "haha", "Nimei"]

println (Array)

println (Array[0])

Array[0] = "Kebe"

println ("Array: \ (array)")

Defines an empty array of type uncertainties

var array2 = []

Array2 = [up]

println (Array2)

println (Array2[1])

/**

* 6, define Dictionary

*/

var dictionary = ["Xiaoming": "Ten", "Xiaohong": "8", "Xiaofang": "12"]

println (dictionary)

println (dictionary["Xiaoming"])

dictionary["xiaoming"] = "20"

println (dictionary)

Defines an empty dictionary of type uncertainties

var dict2 = [:]

Dict2 = [2: "2", 3:3]

println (DICT2)

/**

* 7, Process Control

*/

Let DataArray = [1,2,3,4,5,6]

var sore =0

For Soretin dataarray{

If Soret > 3{

Sore + = 5

}else{

Sore-= 2

}

}

println (sore)

var count = 0;

Forvar i = 0;i <3;++i{

Count + = 1;

}

println ("count=\ (count)")

var firstforloop =0

For Iin 1...4 {

Firstforloop + = i

}

println ("firstforloop=\ (Firstforloop)")

Func greet (name:string,day:string)->string{

Return "hello,\ (name), Today is \ (day)"

}

Let look = Greet ("Kobe", "Monday")

println ("\ (look)")

/**

Use tuple (tuple) to return multiple values

*/

Func GetPrice (), (double,int,float) {

Return (3.33,3,3.3)

}

Let A = GetPrice ()

println ("\ (GetPrice ())")

/**

* Functions can accept variable parameters, collected into an array

*/

Func sumof (Numbers:int ...) ->int{

var sum = 0

For number in numbers{

Sum + = number

}

return sum

}

Let Suma =sumof ()

Let Sumb =sumof (12,12,123)

println ("suma=\ (suma)")

println ("Sumb =\ (sumb)")

/**

* Objects and classes

*/

Class Shape {

var numberofsides = 0

Func simpledescriptio ()->string{

Return "A shape wiht \ (numberofsides)"

}

}

var shape =shape ()

Shape.numberofsides =7

Let Shapdes = Shape.simpledescriptio ()

println ("Shapdes =\ (shapdes)")

/**

* Use the Init constructor to instantiate a class

*/

Class Shape1 {

var numberofsides = 0

var name:string

Init (name:string) {

Self.name = Name

}

Func simpledescriptio ()->string{

Return "A shape wiht \ (numberofsides)"

}

}

var shape1 =shape1 (name: "Wang")

println ("Shape1 =\ (shape1.name)")

SWIF Basic Syntax 01