1 files changed, 25 insertions, 35 deletions
diff --git a/source/arduino/modulo.rst b/source/arduino/modulo.rst
index 195d15b..64a546d 100644
--- a/source/arduino/modulo.rst
+++ b/source/arduino/modulo.rst
@@ -1,3 +1,5 @@
+.. highlight:: cpp
+
 .. _arduino-modulo:
 
 % (modulo)
@@ -6,79 +8,67 @@
 Description
 -----------
 
-Calculates the remainder when one integer is divided by another. It
-is useful for keeping a variable within a particular range (e.g.
-the size of an array).
-
-
+Calculates the `remainder <http://en.wikipedia.org/wiki/Remainder>`_
+when one integer is divided by another. It is useful for keeping a
+variable within a particular range (e.g.  the size of an array).
 
 Syntax
 ------
 
-result = dividend % divisor
+::
+
+    result = dividend % divisor
 
 
 
 Parameters
 ----------
 
-dividend: the number to be divided
-
-
-
-divisor: the number to divide by
-
+**dividend**: the number to be divided
 
+**divisor**: the number to divide by
 
 Returns
 -------
 
-the remainder
-
-
+The remainder of **dividend**\ /\ **divisor**\ .
 
 Examples
 --------
 
 ::
 
+    int x;
     x = 7 % 5;   // x now contains 2
     x = 9 % 5;   // x now contains 4
     x = 5 % 5;   // x now contains 0
     x = 4 % 5;   // x now contains 4
 
-
-
-Example Code
-------------
-
 ::
 
     /* update one value in an array each time through a loop */
-    
+
     int values[10];
     int i = 0;
-    
-    void setup() {}
-    
-    void loop()
-    {
-      values[i] = analogRead(0);
-      i = (i + 1) % 10;   // modulo operator rolls over variable  
-    }
 
+    void setup() {
+        // no setup necessary
+    }
 
+    void loop() {
+      values[i] = analogRead(0);
+      i = (i + 1) % 10;   // modulo operator makes sure i stays between 0 and 9
+    }
 
 Tip
 ---
 
-The modulo operator does not work on floats.
-
+The modulo operator does not work on floats.  For that, you can use
+the C standard library function `fmod()
+<http://sourceware.org/newlib/libm.html#fmod>`_.
 
 
-See also
+See Also
 --------
 
-
--  `division <http://arduino.cc/en/Reference/Arithmetic>`_
-
+-  :ref:`Arithmetic <arduino-arithmetic>`