( System interface

Info Catalog ( Output ( Input and output
 6.6.4 System interface
 Questions of system interface generally fall outside of the domain of
 this report.  However, the following operations are important enough to
 deserve description here.
  -- optional procedure: load filename
      FILENAME should be a string naming an existing file containing
      Scheme source code.  The `load' procedure reads expressions and
      definitions from the file and evaluates them sequentially.  It is
      unspecified whether the results of the expressions are printed.
      The `load' procedure does not affect the values returned by
      `current-input-port' and `current-output-port'.  `Load' returns an
      unspecified value.
           _Rationale:_ For portability, `load' must operate on source
           files.  Its operation on other kinds of files necessarily
           varies among implementations.
  -- optional procedure: transcript-on filename
  -- optional procedure: transcript-off
      FILENAME must be a string naming an output file to be created. The
      effect of `transcript-on' is to open the named file for output,
      and to cause a transcript of subsequent interaction between the
      user and the Scheme system to be written to the file.  The
      transcript is ended by a call to `transcript-off', which closes the
      transcript file.  Only one transcript may be in progress at any
      time, though some implementations may relax this restriction.  The
      values returned by these procedures are unspecified.
Info Catalog ( Output ( Input and output
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