title: Where is pow function defined and implemented in C?
body: <p>I read that the pow(double, double) function is defined in "math.h" but I can't find its declaration. </p>
  
  <p>Does anybody know where this function declared? And where is it implemented in C?</p>
  
  <p>Reference:</p>
  
  <blockquote>
    <p><a href="http://publications.gbdirect.co.uk/c_book/chapter9/maths_functions.html" rel="noreferrer">http://publications.gbdirect.co.uk/c_book/chapter9/maths_functions.html</a></p>
  </blockquote>