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  • This command terminates the input process in the middle of a file. It is redundant at the end of a file.
  • On encountering this command, TeX continues reading until the end of the line. This makes it possible to wrap \endinput in an \if oneliner.


  % Questions, for teachers and students ...
  % Answers, for teacher only

If the \if statement cannot be a oneliner (for legibility reasons, say), then one can use \expandafter:

       % ... various other statements ...