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Predicate read/1
Availability:built-in
[ISO]read(-Term)
Read the next Prolog term from the current input stream and unify it with Term. On a syntax error read/1 displays an error message, attempts to skip the erroneous term and fails. On reaching end-of-file Term is unified with the atom end_of_file.
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Wouter Beek said (2017-10-28T13:40:36):0 upvotes 0 0 downvotes
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This requires the last two characters to be dot and newline (in that order). When leaving out the dot the input prompt will not go away. The dot is not part of the read term (nor is the newline).