Info: (web2c) \input filenames

web2c: \input filenames

 
 4.5 '\input' filenames
 ======================
 
 TeX, Metafont, and MetaPost source programs can all read other source
 files with the '\input' (TeX) and 'input' (MF and MP) primitives:
      \input NAME % in TeX
 
    The file NAME can always be terminated with whitespace; for Metafont
 and MetaPost, the statement terminator ';' also works.  (LaTeX and other
 macro packages provide other interfaces to '\input' that allow different
 notation; here we are concerned only with the primitive operation.)
 
    As (allowed) extensions to standard TeX, Web2c also supports
 specifying the filename in double quotes ('"some name"') and in braces
 ('{some name}'), which is convenient for filenames containing spaces or
 other special characters, as described in the sections below.
 
    In all cases, space tokens are ignored after the filename is read.
 
    Also, double quote ('"') characters are ignored within the filename;
 there is no way to read files whose names contain a '"'.
 
    However, for maximal portability of your document across systems, use
 only the characters 'a'-'z', '0'-'9', and at most one '.'.  Do not use
 anything but simple filenames, since directory separators vary among
 systems; instead, add the necessary directories to the appropriate
 search path.
web2c: \input filenames

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