[ios] swift 체험하기 #1 변수

import UIKit

 

var str = "Hello, playground" //String

print(str)

var str2:String = "string"

print(str2)

//str = 1 => error

 

var a = 1 //Int

var b:Int = 1

print(a + b)

print(a - b)

print(a * b)

print(a / b)

print(a % b)

 

var c = 10

c = 11

let d = 20 //const

//d = 21 => error

 

var d_a = 1.1 //Double

print(d_a)

//d_a = f_a * a => error

 

var f_a:Float = 1.8

print(f_a)

 

print(Int(d_a))

print(Int(f_a)) //floor

 

print(floor(f_a))

print(round(f_a))

print(ceil(f_a))