s="number">0.0</span><span class="special">;</span>
</pre>
<p>
      </p>
<p>
        For the integration itself we'll use the <code class="computeroutput"><span class="identifier">integrate</span></code>
        function, which is a convenient way to get quick results. It is based on
        the error-controlled <code class="computeroutput"><span class="identifier">runge_kutta54_cash_karp</span></code>
        stepper (5th order) and uses adaptive step-size.
      </p>
<p>
</p>
<pre class="programlisting">