PLOGHELP LESSTHAN Chris Mellish, August 1982
Revised by Kathryn Seifert October 1986
Operators which compare the numerical magnitudes of expressions
?- X < Y.
?- X =< Y.
Keywords: numerical magnitude, less than, operators, symbols,
arithmetic expressions
Goals of the form
?- X < Y.
will succeed if the number X is less than the number Y. The arguments
are evaluated, so that
?- 1 + 3 < 5 + 9.
will succeed.
Goals of the form
?- X =< Y.
will succeed if the number X is less than or equal to the number Y. The
arguments are evaluated, so that
?- 1 + 4 =< 0 - 9.
will fail.
By default, "<" and "<=" have precedence 40 and fix "xfx". (see
PLOGHELP * OP and PLOGHELP * OPERATORS).
-- RELATED DOCUMENTATION -----------------------------------------------
PLOGHELP * IS
Evaluating POP-11 and arithmetic expressions which return one result
PLOGHELP * SYMBOLS
Summary and index of HELP files for symbols used in Prolog
PLOGHELP * OPERATORS
Operator declarations made when the Prolog system is loaded
PLOGHELP * OP
How to declare operators
PLOGHELP * GREATERTHAN
Operators which compare the numerical magnitudes of expressions
PLOGHELP * COMPARE
Describes more general predicates for doing comparisons.
--- C.all/plog/help/lessthan
--- Copyright University of Sussex 1991. All rights reserved. ----------