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-.. highlight:: cpp
-
-.. _lang-scope:
-
-Scope
-=====
-
-Variables in the C++ programming language, which Maple uses (all of
-your sketches are C++ programs in disguise), have a property called
-*scope*.  Simply put, a variable's scope is made up of all of the
-lines where the variable can be used.
-
-Scope in C++ is a fairly complex topic, so we won't try to describe it
-in full here.  Instead, we present a simplified view, describing two
-different kinds of scopes, *global* and *local*.  For more detailed
-information, consult a C++ reference.
-
-Global and Local Variables
---------------------------
-
-A global variable is one that can be "seen" by every function in a
-program.  In the :ref:`Maple IDE <ide>`, any variable declared outside
-of a function (like :ref:`setup() <lang-setup>` and :ref:`loop()
-<lang-loop>`) is a global variable.
-
-A local variable can only be "seen" inside of a particular function.
-You can declare a variable to be local to a function by declaring it
-inside of the :ref:`curly braces <lang-curly-braces>` which enclose
-that function.
-
-When programs start to get larger and more complex, local variables
-are a useful way to ensure that a function has exclusive access to its
-own variables.  This prevents programming errors when one function
-mistakenly modifies variables used by another function.
-
-It is also sometimes useful to declare and initialize a variable
-inside a :ref:`for <lang-for>` loop. This creates a variable that
-can only be accessed from inside the loop body.
-
-Example
--------
-
-Here is an example sketch (which you can copy into the Maple IDE and
-run on your Maple) that illustrates the use of global and local
-variables, as well as declaring variables inside of a ``for`` loop.
-Be sure to open a :ref:`serial monitor <ide-serial-monitor>` after you
-:ref:`verify <ide-verify>` and :ref:`upload <ide-upload>` the sketch::
-
-    int globalVar;  // any function will see this variable
-
-    void setup() {
-      // since "globalVar" is declared outside of any function,
-      // every function can "see" and use it:
-      globalVar = 50;
-
-      // the variables "i" and "d" declared inside the "loop" function
-      // can't be seen here.  see what happens when you uncomment the
-      // following lines, and try to Verify (compile) the sketch:
-      //
-      // i = 16;
-      // SerialUSB.print("i = ");
-      // SerialUSB.println(i);
-      // d = 26.5;
-      // SerialUSB.print("d = ");
-      // SerialUSB.println(d);
-    }
-
-    void loop() {
-      // since "i" and "d" are declared inside of the "loop" function,
-      // they can only be seen and used from inside of it:
-      int i;
-      double d;
-
-      for (int j = 0; j < 5; j++) {
-          // variable i can be used anywhere inside the "loop" function;
-          // variable j can only be accessed inside the for-loop brackets:
-          i = j * j;
-          SerialUSB.print("i = ");
-          SerialUSB.println(i);
-      }
-
-      // globalVar can be accessed from anywhere.  note how even
-      // though we set globalVar = 50 in the "setup" function, we can
-      // see that value here:
-      SerialUSB.print("globalVar = ");
-      SerialUSB.println(globalVar);
-
-      // d can be accessed from anywhere inside the "loop" function:
-      d = 26.5;
-      SerialUSB.print("d = ");
-      SerialUSB.print(d);
-      SerialUSB.println(" (before separateFunction())");
-
-      separateFunction();
-
-      // notice how even though separateFunction() has a variable
-      // named "d", it didn't touch our (local) variable which has
-      // the same name:
-      SerialUSB.print("d = ");
-      SerialUSB.print(d);
-      SerialUSB.println(" (after separateFunction())");
-    }
-
-    void separateFunction() {
-      // variable "d" here has the same name as variable "d" inside of
-      // the "loop" function, but since they're both _local_
-      // variables, they don't affect each other:
-      double d = 30.5;
-      SerialUSB.print("d = ");
-      SerialUSB.print(d);
-      SerialUSB.println(" (inside of separateFunction())");
-    }
-
-See Also
---------
-
-- `C++ programming Wikibook <http://en.wikibooks.org/wiki/C%2B%2B_Programming/Programming_Languages/C%2B%2B/Code/Statements/Scope>`_.
-- Wikipedia article on `scope <http://en.wikipedia.org/wiki/Scope_%28programming%29>`_
-
-.. include:: cc-attribution.txt