put(+Stream, +Code)

Stream

Stream handle or alias (atom)

Code

Integer.

Description

Note that the output from put/2 is usually buffered, and is only output to the stream when the output is flushed (e.g. using flush/1).

Character codes for the non-printable characters (i.e. control characters) are also acceptable.

Modes and Determinism

• put(+, +) is det

Exceptions

(4) instantiation fault

Stream is not instantiated.

(4) instantiation fault

Code is not instantiated.

(5) type error

Stream is neither a stream handle nor an atom.

(5) type error

Code is instantiated, but not to an integer.

(192) illegal stream mode

Stream is not an output stream.

(193) illegal stream specification

Stream is an illegal stream specification.

Examples

Success:
      ?- put(output, 0'a).
      a
      yes.

      ?- sh('cat file1').
      a
      yes.
      ?- open(file1,read,s1),
         open(file2,write,s2),repeat,
         ( at_eof(s1) ->
              !,
              flush(s2),
              close(s1),close(s2)
         ;
              get(s1,Char),
              put(s2,Char),
              fail
         ).
      Char = _g72
      yes.
      ?- sh('cat file2').
      a
      yes.

Error:
      put(output,A).             (Error 4).
      put(Stream,98).            (Error 4).
      put(output, '98').         (Error 5).
      put(output, 98.0).         (Error 5).
      put("string" A).           (Error 5).
      put(11,97).                (Error 192). % stream not open
      put(atom,97).              (Error 193).

See Also