span class="nv">write</span><span class="ss">(</span><span class="o">*</span>,<span class="o">*</span><span class="ss">)</span> <span class="s1">&#39;</span><span class="s">1/2 value of string is </span><span class="s1">&#39;</span>,<span class="nv">s2v</span><span class="ss">(</span><span class="nv">s</span><span class="ss">)</span><span class="o">/</span><span class="mi">2</span>.<span class="mi">0</span><span class="nv">d0</span>
 <span class="nv">write</span><span class="ss">(</span><span class="o">*</s