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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <head> <title>Arduino - StringIndexOf </title> <link rel='stylesheet' href='arduino.css' type='text/css' /> <meta name="verify-v1" content="TtxFIEJAB6zdJ509wLxjnapQzKAMNm9u0Wj4ho6wxIY=" /> </head> <body> <div id="page"> <!--PageHeaderFmt--> <div id="pageheader"> <div class="title"><a href="http://www.arduino.cc"/>Arduino</a></div> <div class="search"> <!-- SiteSearch Google --> <FORM method=GET action="http://www.google.com/search"> <input type=hidden name=ie value=UTF-8> <input type=hidden name=oe value=UTF-8> <INPUT TYPE=text name=q size=25 maxlength=255 value=""> <INPUT type=submit name=btnG VALUE="search"> <input type=hidden name=domains value="http://www.arduino.cc/"> <input type=hidden name=sitesearch value="http://www.arduino.cc/"> </FORM> <!-- SiteSearch Google --> </div> </div> <!--/PageHeaderFmt--> <!--PageLeftFmt--> <div id="pagenav" style="text-align: right"> <div style="float: left;"> <p><a class='wikilink' href='http://arduino.cc/en/Main/Buy'>Buy</a>
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<p class='vspace'></p><p><a class='wikilink' href='StringClass.html'>String</a>
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<p class='vspace'></p><h2>indexOf()</h2>
<h4>Description</h4>
<p>Locates a character or String within another String. By default, searches from the beginning of the String, but can also start from a given index, allowing for the locating of all instances of the character or String.
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<p class='vspace'></p><h4>Syntax</h4>
<p><em>string</em>.indexOf(val)<br /><em>string</em>.indexOf(val, from)
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<p class='vspace'></p><h4>Parameters</h4>
<p>string: a variable of type String<br />val: the value to search for - <em>char</em> or <em>String</em><br />from: the index to start the search from
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<p class='vspace'></p><h4>Returns</h4>
<p>The index of val within the String, or -1 if not found.
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<p class='vspace'></p><h4>Example</h4>
<ul><li><a class='createlinktext' rel='nofollow'
href='http://arduino.cc/en/Tutorial/StringIndexOf?action=edit'>StringIndexOf</a><a rel='nofollow'
class='createlink' href='http://arduino.cc/en/Tutorial/StringIndexOf?action=edit'>?</a>
</li></ul><p class='vspace'></p><h4>See also</h4>
<ul><li><a class='wikilink' href='StringLastIndexOf.html'>lastIndexOf</a>()
</li><li><a class='wikilink' href='StringStartsWith.html'>startsWith</a>()
</li><li><a class='wikilink' href='StringEndsWith.html'>endsWith</a>()
</li></ul><p class='vspace'></p><p><a class='wikilink' href='index.html'>Reference Home</a>
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