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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. public static void main (String[] args) throws java.lang.Exception
  11. {
  12. int a, b, priznak;
  13.  
  14. for(a = 2; a<100;a++){
  15. priznak = 0; //пока нет делителей
  16.  
  17. for(b=2;b<=a/b;b++)
  18. if((a%b) == 0) { priznak++; break; }
  19.  
  20. if(priznak==0)
  21. System.out.println(a + " is prime.");
  22. }
  23. }
  24. }
Success #stdin #stdout 0.1s 320320KB
stdin
Standard input is empty
stdout
2 is prime.
3 is prime.
5 is prime.
7 is prime.
11 is prime.
13 is prime.
17 is prime.
19 is prime.
23 is prime.
29 is prime.
31 is prime.
37 is prime.
41 is prime.
43 is prime.
47 is prime.
53 is prime.
59 is prime.
61 is prime.
67 is prime.
71 is prime.
73 is prime.
79 is prime.
83 is prime.
89 is prime.
97 is prime.