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dimipan80

Prime Number Check

Aug 4th, 2014
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Java 0.86 KB | None | 0 0
  1. /* Write an expression that checks if given positive integer number n (n ≤ 100) is prime
  2.  * (i.e. it is divisible without remainder only to itself and 1). */
  3.  
  4. import java.util.Scanner;
  5.  
  6. public class CheckGivenPositiveIntegerIsPrime {
  7.  
  8.     public static void main(String[] args) {
  9.         // TODO Auto-generated method stub
  10.         System.out.print("Enter a Integer number in the range [0 .. 100] : ");
  11.         Scanner input = new Scanner(System.in);
  12.         int number = input.nextInt();
  13.         input.close();
  14.  
  15.         if (number > -1 && number < 101) {
  16.             boolean numIsPrime = (number == 2 || number == 3 || number == 5 || number == 7)
  17.                     || (number != 1 && number % 2 != 0 && number % 3 != 0 && number % 5 != 0 && number % 7 != 0);
  18.  
  19.             System.out.printf("That Number is Prime: %b !\n", numIsPrime);
  20.         } else {
  21.             System.out.println("Error! - Your Number is out of Range!!!");
  22.         }
  23.     }
  24.  
  25. }
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