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+.. _arduino-increment:
+
+++ (increment) / -- (decrement)
+===============================
+
+Description
+-----------
+
+Increment or decrement a variable
+
+
+
+Syntax
+------
+
+::
+
+    x++;  // increment x by one and returns the old value of x
+    ++x;  // increment x by one 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  
+
+
+
+Parameters
+----------
+
+x: an integer or long (possibly unsigned)
+
+
+
+Returns
+-------
+
+The original or newly incremented / decremented value of the
+variable.
+
+
+
+Examples
+--------
+
+::
+
+    x = 2;
+    y = ++x;      // x now contains 3, y contains 3
+    y = x--;      // x contains 2 again, y still contains 3 
+
+
+
+See also
+--------
+
+`+= <http://arduino.cc/en/Reference/Arithmetic>`_
+`-= <http://arduino.cc/en/Reference/Arithmetic>`_
+
+