 }
 
 isUnique("hello")
+
 
 
 




// reverse an integer
func reverseInt(num: Int) -> Int {

    var intArr: Array<Int> = [] // placeholder array
    
    var numStr = String(num)
    var strArr = Array(numStr.characters)
    
    for item in strArr {
//        intArr.insert(item, atIndex: 0)
    }
    
    return 0
}
reverseInt(543)




        
        lowestAndHighest.append(lowest) // append at index 0
        lowestAndHighest.insert(highest, atIndex: lowestAndHighest.endIndex) // append at index 1
    }
    return lowestAndHighest
}
findMinAndMax([5, 3, 7, 9, 21, 2])
