.. highlight:: cpp .. _lang-compoundarithmetic: Compound Arithmetic Operators (``+=`` , ``-=``, ``*=``, ``/=``) =============================================================== These oparators perform a mathematical operation on a variable with another constant or variable. These operators are just a convenient shorthand:: x += y; // equivalent to the expression x = x + y; x -= y; // equivalent to the expression x = x - y; x *= y; // equivalent to the expression x = x * y; x /= y; // equivalent to the expression x = x / y; Here is an example:: int x = 2; int y = 10; x += 4; // x now contains 6 x -= 3; // x now contains 3 x *= y; // x now contains 30 x /= 2; // x now contains 15 x += max(20, 6); // x now contains 35 x -= sq(5); // x now contains 15 Parameters ---------- **x**: a numeric variable **y**: a numeric variable, number constant, or any other expression that evaluates to a number (e.g. call to a function that returns a number). See Also -------- - :ref:`Arithmetic operators <lang-arithmetic>` .. include:: /arduino-cc-attribution.txt