ios - concatenating NSString and Int in Apple Swift -

ios - concatenating NSString and Int in Apple Swift -

i have used arc4random_uniform() random values given string or int. want bring together values.

var randomnumber = arc4random_uniform(9999) + 1000 // returns random number between 1000 , 9999 e.g. - 7501 allow alphabet_array = ["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"] allow randomindex = int(arc4random_uniform(uint32(alphabet_array.count))) allow random_alphabet = alphabet_array[randomindex] // returns random alphabet e.g. - e

what want display 7501 , e 7501e

var str="\(randomnumber)\(random_alphabet)" // error

i getting below error :

command /applications/xcode6-beta.app/contents/developer/toolchains/xcodedefault.xctoolchain/usr/bin/swift failed exit code 254

please help how can display together.

it works fine right punctuation:

var randomnumber = arc4random_uniform(999) + 1000 // returns random number between 1000 , 9999 e.g. - 7501 note 999 not 9999 allow alphabet_array = ["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"] // note missing "=" in op allow randomindex = int(arc4random_uniform(uint32(alphabet_array.count))) allow random_alphabet = alphabet_array[randomindex] // returns random alphabet e.g. - e var str = "\(randomnumber)\(random_alphabet)" // e.g. 1197a

ios objective-c swift