omment">// We can declare constants using GCC or Intel's native types, and the Q suffix,</span>
   <span class="comment">// these can be declared constexpr if required:</span>

   <span class="keyword">constexpr</span> <span class="identifier">float128</span> <span class="identifier">pi</span> <span class="special">=</span> <span class="number">3.1415926535897932384626433832795028841971693993751058</span><span class="identifier">Q</span><span class="special">;</span>

   <span class="keyword">return</span> 