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+.. _arduino-incrementcompound:
+
++= , -= , \*= , /=
+==================
+
+Description
+-----------
+
+Perform a mathematical operation on a variable with another
+constant or variable. The += (et al) operators are just a
+convenient shorthand for the expanded syntax, listed below.
+
+
+
+Syntax
+------
+
+::
+
+ 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;
+
+
+
+Parameters
+----------
+
+x: any variable type
+
+
+
+y: any variable type or constant
+
+
+
+Examples
+--------
+
+::
+
+ x = 2;
+ x += 4; // x now contains 6
+ x -= 3; // x now contains 3
+ x *= 10; // x now contains 30
+ x /= 2; // x now contains 15
+
+