How to make calculator calculate in decimal form - ios

Question

Here's my code for my calculator and it works fine!
import UIKit
class ViewController: UIViewController {
var number1 = 0
var number2 = 0
var operation = 0
#IBOutlet var screen: UILabel!
#IBAction func Onebutton(sender: AnyObject) {
addNumber(1)
}
#IBAction func Twobutton(sender: AnyObject) {
addNumber(2)
}
#IBAction func Threebutton(sender: AnyObject) {
addNumber(3)
}
#IBAction func Fourbutton(sender: AnyObject) {
addNumber(4)
}
#IBAction func Fivebutton(sender: AnyObject) {
addNumber(5)
}
#IBAction func Sixbutton(sender: AnyObject) {
addNumber(6)
}
#IBAction func Sevenbutton(sender: AnyObject) {
addNumber(7)
}
#IBAction func Eightbutton(sender: AnyObject) {
addNumber(8)
}
#IBAction func Ninebutton(sender: AnyObject) {
addNumber(9)
}
#IBAction func Zerobutton(sender: AnyObject) {
addNumber(0)
}
#IBAction func Multiplybutton(sender: AnyObject) {
operation = 1
}
#IBAction func Dividebutton(sender: AnyObject) {
operation = 2
}
#IBAction func Addbutton(sender: AnyObject) {
operation = 3
}
#IBAction func Subtractbutton(sender: AnyObject) {
operation = 4
}
#IBAction func Equalsbutton(sender: AnyObject) {
switch operation{
case 1: screen.text = String (number1*number2)
case 2: screen.text = String (number1/number2)
case 3: screen.text = String (number1+number2)
case 4: screen.text = String (number1-number2)
default: println()
}
}
#IBAction func clearbutton(sender: AnyObject) {
number1 = 0
number2 = 0
operation = 0
screen.text = "0"
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func addNumber (pushButton : Int){
if operation == 0 {
number1 = number1*10+pushButton
screen.text = String (number1)
} else {
number2 = number2*10+pushButton
screen.text = String (number2)
}
}
}
But I want to make the calculator calculate in decimal form and not round off to the nearest number.

Answer 1

Use floats.
var number: Float = 0
number = number + 0.1
println(number)
//0.1 should be printed.
You are currently basically saying:
var number: Int = 0
This is pretty much how the computer reads it; number is an integer. To make it so that number can be a decimal (float), you have to say:
var number: Float = 0