89" name="l00089"></a><span class="lineno">   89</span><span class="keyword">end module</span></div>
<div class="ttc" id="agroup__group__string_html_ga8138bcb734cadd41bccf9966556cdf4e"><div class="ttname"><a href="group__group__string.html#ga8138bcb734cadd41bccf9966556cdf4e">evaluate_string::is_letter</a></div><div class="ttdeci">pure logical function, public is_letter(ch)</div><div class="ttdoc">Check if the character is a letter.</div><div class="ttdef"><b>Definition</b> <a href="#l00030">String.f90:31</a