.. highlight:: cpp .. _lang-max: max() ===== (Macro) Calculates the maximum of two numbers. Syntax ------ :: max(x, y) Parameters ---------- **x**: the first number; may be any number or numeric expression. **y**: the second number; may be any number or numeric expression. Returns ------- The larger of the two parameter values. Example ------- :: sensVal = max(senVal, 20); // assigns sensVal to the larger of sensVal or 20 // (effectively ensuring that it is at least 20) .. note:: Perhaps counter-intuitively, max() is often used to constrain the lower end of a variable's range, while :ref:`min() <lang-min>` is used to constrain the upper end of the range. Warning ------- Because of the way ``max()`` is implemented, avoid using other functions inside the parentheses. It may lead to incorrect results:: max(a--, 0); // avoid this - yields incorrect results a--; // use this instead - max(a, 0); // keep other operations outside max() Arduino Compatibility --------------------- The Maple implementation of ``max()`` is compatible with Arduino. See Also -------- - :ref:`min() <lang-min>` - :ref:`constrain() <lang-constrain>` .. include:: /arduino-cc-attribution.txt