span>
    <span class="n">a</span><span class="p">:</span><span class="nb">int</span><span class="p">,</span> <span class="c1"># The first number to be added</span>
    <span class="n">b</span><span class="p">:</span><span class="n">Union</span><span class="p">[</span><span class="nb">int</span><span class="p">,</span> <span class="nb">float</span><span class="p">]</span><span class="o">=</span><span class="mf">2.</span><span class="p">,</span> <span class="c1"># The second number to be added</span>
<span c