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# ?ExprX #=< ?ExprY

ExprX is less than or equal to ExprY (with integrality constraints).

ExprX
  Integer arithmetic expression
ExprY
  Integer arithmetic expression

## Description

Constrains ExprX to be less than or equal to ExprY. Also constrains all variables appearing in ExprX and ExprY to be integral and checks that all constants are integers.

Note that if all variables and constants appearing in this constraint are already integral, then the constraint is equivalent to ic:(ExprX =< ExprY).

## See Also

#< / 2, #= / 2, #>= / 2, #> / 2, #\= / 2, =< / 2, #=< / 3, suspend : #=< / 2, gfd : #=< / 2