'''file mtime''' ''name ?time?''

Returns a decimal string giving the time at which file ''name'' was last modified. If ''time'' is specified, it is a modification time to set for the file (equivalent to Unix '''touch'''). The time is measured in the standard POSIX fashion as seconds from a fixed starting time (often January 1, 1970). If the file doesn't exist or its modified time cannot be queried or set then an error is generated.

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See also:

   * [file]
   * [file atime]
   * [file stat]

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