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99 lines
4.4 KiB
HTML
99 lines
4.4 KiB
HTML
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<html>
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<title>Arduino - Max </title>
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<p><strong>Reference</strong> <a class='wikilink' href='index.html'>Language</a> (<a class='wikilink' href='Extended.html'>extended</a>) | <a class='wikilink' href='Libraries.html'>Libraries</a> | <a class='wikilink' href='Comparison.html'>Comparison</a> | <a class='wikilink' href='Changes.html'>Changes</a>
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</p>
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<p class='vspace'></p><h2>max(x, y)</h2>
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<h4>Description</h4>
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<p>Calculates the maximum of two numbers.
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</p>
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<p class='vspace'></p><h4>Parameters</h4>
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<p>x: the first number, any data type
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</p>
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<p class='vspace'></p><p>y: the second number, any data type
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<p class='vspace'></p><h4>Returns</h4>
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<p>The larger of the two parameter values.
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<p class='vspace'></p><h4>Example</h4>
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<pre>sensVal = max(senVal, 20); // assigns sensVal to the larger of sensVal or 20
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// (effectively ensuring that it is at least 20)
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</pre><h4>Note</h4>
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<p>Perhaps counter-intuitively, max() is often used to constrain the lower end of a variable's range, while min() is used to constrain the upper end of the range.
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</p>
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<p class='vspace'></p><h4>Warning</h4>
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<p>Because of the way the max() function is implemented, avoid using other functions inside the brackets, it may lead to incorrect results
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</p>
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<p class='vspace'></p><pre>
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max(a--, 0); // avoid this - yields incorrect results
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a--; // use this instead -
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max(a, 0); // keep other math outside the function
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</pre>
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<p class='vspace'></p><h4>See also</h4>
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<ul><li><a class='wikilink' href='Min.html'>min</a>()
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</li><li><a class='wikilink' href='Constrain.html'>constrain</a>()
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</li></ul><p class='vspace'></p><p><a class='wikilink' href='index.html'>Reference Home</a>
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<p class='vspace'></p><p><em>Corrections, suggestions, and new documentation should be posted to the <a class='urllink' href='http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?board=swbugs' rel='nofollow'>Forum</a>.</em>
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<p class='vspace'></p><p>The text of the Arduino reference is licensed under a
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<a class='urllink' href='http://creativecommons.org/licenses/by-sa/3.0/' rel='nofollow'>Creative Commons Attribution-ShareAlike 3.0 License</a>. Code samples in the reference are released into the public domain.
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