- check-number LOC OBJ #!optional ARGNAMprocedure
- check-positive-number LOC OBJ #!optional ARGNAMprocedure
- check-non-negative-number LOC OBJ #!optional ARGNAMprocedure
- check-natural-number LOC OBJ #!optional ARGNAMprocedure
- check-negative-number LOC OBJ #!optional ARGNAMprocedure
- check-non-positive-number LOC OBJ #!optional ARGNAMprocedure