"><span class="identifier">my_constant</span></code>
      goes like this:
    </p>
<p>
      1. <span class="bold"><strong>Define a function that calculates the value of the
      constant</strong></span>. This should be a template function, and be placed in
      <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">math</span><span class="special">/</span><span class="identifier">constants</span><span class="special">/</span><span class="