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# $<(?Expr1, ?Expr2, ?Bool)

Reified arithmetic comparison

Expr1
  An arithmetic expression
Expr2
  An arithmetic expression
Bool
  Variable, 0 or 1

## Description

Reified version of $ This constraint suspends until its first two arguments are ground. It then unifies Bool according to the truth value of the corresponding $Modules This predicate is sensitive to its module context (tool predicate, see @/2).

### Exceptions

(24) number expected
  Expr1 or Expr2 is not an arithmetic expression.

## See Also

$< / 2, < / 3