(octave.info)Printing Notation

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1.3.3 Printing Notation
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Many of the examples in this manual print text when they are evaluated.
In this manual the printed text resulting from an example is indicated
by ‘⊣’.  The value that is returned by evaluating the expression is
displayed with ‘⇒’ (‘1’ in the next example) and follows on a separate
line.

     printf ("foo %s\n", "bar")
          ⊣ foo bar
          ⇒ 1