diff options
Diffstat (limited to 'source/arduino/arithmeticcompound.rst')
-rw-r--r-- | source/arduino/arithmeticcompound.rst | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/source/arduino/arithmeticcompound.rst b/source/arduino/arithmeticcompound.rst new file mode 100644 index 0000000..a2c5b89 --- /dev/null +++ b/source/arduino/arithmeticcompound.rst @@ -0,0 +1,43 @@ +.. highlight:: cpp + +.. _arduino-arithmeticcompound: + +Compound Arithmetic Operators (``+=`` , ``-=``, ``*=``, ``/=``) +=============================================================== + +Description +----------- + +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 <arduino-arithmetic>` |