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OpenDarwin 7.2.1 - man page for variable (opendarwin section n)

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variable(n)			      Tcl Built-In Commands			      variable(n)

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NAME
       variable - create and initialize a namespace variable

SYNOPSIS
       variable ?name value...? name ?value?
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DESCRIPTION
       This  command is normally used within a namespace eval command to create one or more vari-
       ables within a namespace.  Each variable name is initialized with value.   The  value  for
       the last variable is optional.

       If a variable name does not exist, it is created.  In this case, if value is specified, it
       is assigned to the newly created variable.  If no value is specified, the new variable  is
       left  undefined.  If the variable already exists, it is set to value if value is specified
       or left unchanged if no value is given.	Normally, name is unqualified (does  not  include
       the names of any containing namespaces), and the variable is created in the current names-
       pace.  If name includes any namespace qualifiers, the variable is created in the specified
       namespace.  If the variable is not defined, it will be visible to the namespace which com-
       mand, but not to the info exists command.

       If the variable command is executed inside a Tcl procedure,  it	creates  local	variables
       linked  to the corresponding namespace variables (and therefore these variables are listed
       by info locals.)  In this way the variable command resembles the global command,  although
       the  global  command  only  links to variables in the global namespace.	If any values are
       given, they are used to modify the values of the associated  namespace  variables.   If	a
       namespace variable does not exist, it is created and optionally initialized.

       A  name argument cannot reference an element within an array.  Instead, name should refer-
       ence the entire array, and the initialization value should be left off.	After  the  vari-
       able  has  been declared, elements within the array can be set using ordinary set or array
       commands.

SEE ALSO
       global(n), namespace(n), upvar(n)

KEYWORDS
       global, namespace, procedure, variable

Tcl					       8.0				      variable(n)
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