Using the indexOf() Method to Find All Occurrences of the Letter e in a Sentence : String « Language Basics « JavaScript DHTML

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JavaScript DHTML » Language Basics » String 

Using the indexOf() Method to Find All Occurrences of the Letter e in a Sentence

<script type="text/javascript" language="JavaScript1.1">
  // Declare variables
  var pos = 0;
  var num = -1;
  var i = -1;
  var graf = "This is a test";
  // Search the string and counts the number of e's
  while (pos != -1) {
    pos = graf.indexOf("e", i + 1);
    num += 1;
    i = pos;
  // Write the response to the page
  document.write("There were " + num + " e's in that paragraph.");  document.close();


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