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+Scope
+=====
+
+We saw in the previous paragraph that functions can be used, and that they can have parameter.
+This forces us to clarify 'scope'.
+
+[source,chapel]
+./scope.lm
+----
+include::code/scope.lm[]
+----
+
+We run it with
+[source,bash]
+----
+/opt/colm/bin/colm scope.lm
+./scope
+----
+
+That gives us:
+----
+in global global
+in A global
+in B a
+in B b
+in A a
+in global global
+in C NIL
+in C c
+in global c
+----
+
+The thesis also mentions that variables can be passed by reference instead of by value.
+
+[source,chapel]
+.nested_scope.lm
+----
+include::code/nested_scope.lm[]
+----
+
+That gives us:
+----
+in global global
+in A global
+in B a
+in B b
+in A a
+in global global
+in C NIL
+in C c
+in global c
+----
+
+[source,bash]
+----
+/opt/colm/bin/colm nested_scope.lm
+./nested_scope
+----
+
+It seems that this is still the case.
+----
+in global global
+before block1 global
+in block1 block1
+in loop block1a
+in block1 block1a
+in A block1a
+in global global
+----