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-.. _arduino-const:
-
-const keyword
-=============
-
-The **const** keyword stands for constant. It is a variable
-*qualifier* that modifies the behavior of the variable, making a
-variable "*read-only*". This means that the variable can be used
-just as any other variable of its type, but its value cannot be
-changed. You will get a compiler error if you try to assign a value
-to a **const** variable.
-
-
-
-Constants defined with the *const* keyword obey the rules of
-*`variable scoping <http://arduino.cc/en/Reference/Scope>`_* that
-govern other variables. This, and the pitfalls of using*#define*,
-makes the *const* keyword a superior method for defining constants
-and is preferred over using
-*`#define <http://arduino.cc/en/Reference/Define>`_*.
-
-
-
-Example
--------
-
-::
-
-    const float pi = 3.14;
-    float x;
-    
-    // ....
-    
-    x = pi * 2;    // it's fine to use const's in math
-    
-    pi = 7;        // illegal - you can't write to (modify) a constant
-    
-
-**#define** or **const**
-------------------------
-
-You can use either **const** or **#define** for creating numeric or
-string constants. For
-`arrays <http://arduino.cc/en/Reference/Array>`_, you will need to
-use **const**. In general *const* is preferred over *#define* for
-defining constants.
-
-
-
-See also:
-
-
--  `#define <http://arduino.cc/en/Reference/Define>`_
--  `volatile <http://arduino.cc/en/Reference/Volatile>`_
-