'''package provide''' ''package ?version?''

This command is invoked to indicate that version ''version'' of package ''package'' is now present in the interpreter. It is typically invoked once as part of an '''ifneeded''' script, and again by the package itself when it is finally loaded. An error occurs if a different version of ''package'' has been provided by a previous '''package provide''' command. If the ''version'' argument is omitted, then the command returns the version number that is currently provided, or an empty string if no '''package provide''' command has been invoked for ''package'' in this interpreter.

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See also:

   * [package]
   * [package present]
   * [package require]

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