From d9cbd78e29d42e70bb46641dd43ee0772c8c975f Mon Sep 17 00:00:00 2001 From: Marti Bolivar Date: Sun, 28 Nov 2010 11:23:33 -0500 Subject: reorganized all the arduino/ docs into a lang/ subdirectory since they're properly CC attributed now. --- source/lang/increment.rst | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 source/lang/increment.rst (limited to 'source/lang/increment.rst') diff --git a/source/lang/increment.rst b/source/lang/increment.rst new file mode 100644 index 0000000..5536a0a --- /dev/null +++ b/source/lang/increment.rst @@ -0,0 +1,44 @@ +.. highlight:: cpp + +.. _lang-increment: + +Increment (``++``) and Decrement (``--``) +========================================= + +These operators increment (add one to) or decrement (subtract one +from) a variable. If they come before the variable, they return its +new value; otherwise, they return its old value. + +Some quick examples:: + + x++; // adds one to x, and returns the old value of x + ++x; // adds one to x, and returns the new value of x + + x--; // decrement x by one and returns the old value of x + --x; // decrement x by one and returns the new value of x + +A more extended example:: + + x = 2; + y = ++x; // x now contains 3, y contains 3 + y = x--; // x contains 2 again, y still contains 3 + +.. warning:: Be careful! You cannot put a space in between the two + ``+`` or ``-`` signs. This example is broken:: + + // this line won't compile (notice the extra space): + int y = x+ +; + +Parameters +---------- + +**x**: an integer value (like an ``int``, ``long``, ``unsigned int``, +etc.). + +See also +-------- + +- :ref:`Compound arithmetic operators ` + + +.. include:: cc-attribution.txt -- cgit v1.2.3