input - How to get Int value from String Swift 2.0 -

basically i'm getting user input number 1-3 , want take user's inputted number , compare random number. code:

func input() -> string {     let keyboard = nsfilehandle.filehandlewithstandardinput()     let inputdata = keyboard.availabledata     return nsstring(data: inputdata, encoding:nsutf8stringencoding) as!         string }  var userinput = input() var usernumber: int? = int(userinput) 

when try print usernumber returns "nil" suggestions? thanks!

i'm dutch, english isn't good. sorry that.
this answer works:

import foundation  print("what age?") var fhcpy: nsdata? = nsfilehandle.filehandlewithstandardinput().availabledata  if let data = fhcpy{     var str: string = nsstring(data: data, encoding: nsutf8stringencoding) as! string     var numstr: string = ""     char in str.characters {         if int("\(char)") != nil {             numstr.append(char)         }     }     var num: int? = int(numstr)     if let opnum = num {         print("your age \(opnum)")     } else {         print("that not valid number. ")     } } 

how have done it
first, tred swift 1.0 method, did cause error (get input in swift 1.0). if let method (error handling). after that, have made optional called fhcpy nsdate value of fh.availbledata. solved problem of if let. want int value (get int value). int(), returns every time nil. use inside variable str.
code:

import foundation  print("what age?") var fhcpy: nsdata? = nsfilehandle.filehandlewithstandardinput().availabledata  if let data = fhcpy{     var str: string = nsstring(data: data, encoding: nsutf8stringencoding) as! string     char in str.characters {         print(char)     }     var num: int? = int(str)     print("your age \(num)") } 

output:

what age? 12 1 2   age nil program ended exit code: 0 

did see newline? program for tests "if character in string int character append strnum". @ end, strnum exported int.

sample code:

import foundation  print("what name?") var fhcpy: nsdata? = nsfilehandle.filehandlewithstandardinput().availabledata  if let data = fhcpy{     var str: string = nsstring(data: data, encoding: nsutf8stringencoding) as! string      print("your name \(str)") }