/*
 * File: prime.kt
 * Purpose: Reads a positive integer from user,
 *   and prints a message saying whether
 *   the number read in is prime or not.
 * Author: the 178 gang
 */

fun main(args: Array<String>) {
    // read in n
    print("Please type in a positive integer: ")
    val n : Int = readLine()!!.toInt()

    // check whether n is prime
    var isPrime : Boolean = if (n == 1) false else true
    var d = 2
    while (d < n) {
        if (n % d == 0) {
            isPrime = false
        }
        d++
    }
    
    // print result
    val neg : String = if (isPrime) "" else " not"
    println("$n is$neg prime")
 }