how to declare variable in swift language


How to declare the variable in swift language

the variable is very importation in any type of language. Swift language is supported by the two type of variable var and let. Var is used to change the value  and let is use not change the value (let is constant variable). Every variable declared in two-way. watch  this video for more understanding.
  


Step - 1

 First open your Xcode

Step - 2

Select create a new Playground project
if don't know how to create playground visited this line 

Step - 3
write your code in the playground


syntax:-
  (var type) variablename = values

two way to create a var variables
   string
var name =  "parth" // first way
var myname:String = "parth" // second way


Integer
var integer = 100
var myinteger:Int = 100

Float
var float = 10.1
var myfloat:Float = 10.1

boolean
var bool = true
var mybool:Bool = true



let is use not change the value (let is constant variable).

same two way to create a let variables

string
let letname = "parth"  // first way
let myletname:String = "parth" // second way

Integer
let letinteger = 100
let myletinteger:Int = 100

Float
let letfloat = 10.1
let myletfloat:Float = 10.1
boolean
let letbool = true
let myletbool:Bool = true


how to append a variable in swift language

// string
var appendstring = "parth"
appendstring += "hardik"

var myappendstring:String = "parth"
myappendstring += "hardik"


// integer
var appendinteger = 100
appendinteger += 100 // append variable
appendinteger -= 10 //  remove value

var myappendinteger:Int = 100
myappendinteger += 100

// float
var appendfloat = 10.1
appendfloat += 10.1
appendfloat -= 5.5

var myappendfloat:Float = 10.1
myappendfloat += 10.1
myappendfloat -= 5.5

// boolean
var appendbool = true
 appendbool = false // your not use binary operator

var myappendbool:Bool = true
myappendbool = false // your not use binary operator

// let variable is not append and remove because let is constant (not change values)

let letappend = 100
letappend += 100  //ERROE 


SEE MY PLAYGROUND SCREENSORT:





if you are more understanding  about variable open this line 




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