 Procedures</h2>
   
    
  <div class="panel panel-default">
  <div class="panel-heading codesum"><span class="anchor" id="proc-sindex_string_string"></span><h3>
public elemental function <a href='../proc/sindex_string_string.html'>sindex_string_string</a>(self, substring, back) result(i)
    
    
   
</h3></div>
  <div class="panel-body">
       
    
    
    <h4>Arguments</h4>
    
      
      
<table class="table table-striped varlist">
<thead><tr><th>Type</th>
<th>Intent</th><th>Optional</th>
<th>At