title: C - how to test easily if it is prime-number?
body: <blockquote>
    <p><strong>Possible Duplicates:</strong><br>
    <a href="https://stackoverflow.com/questions/1538644/c-determine-if-a-number-is-prime">C - determine if a number is prime</a>  </p>
  </blockquote>
  
  
  
  <p>Is there any way to test easily in C whether a selected number is prime or not?</p>