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jeremyhyltonjeremyhylton
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Reword explanation of global statement since an undeclared global is a
free variable and is subject to those rules.
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‎Doc/ref/ref6.tex‎

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@@ -719,9 +719,9 @@ \section{The \keyword{global} statement \label{global}}
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The \keyword{global} statement is a declaration which holds for the
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entire current code block. It means that the listed identifiers are to be
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interpreted as globals. While \emph{using} global names is automatic
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if they are not defined in the local scope, \emph{assigning} to global
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names would be impossible without \keyword{global}.
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interpreted as globals. It would be impossible to assign to a global
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variable without \keyword{global}, although free variables may refer
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to globals without being declared global.
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\indexiii{global}{name}{binding}
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Names listed in a \keyword{global} statement must not be used in the same

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