Arguments

grading  (ename or vla-object) the TinGrading entity
slope   (number, integer or double)  the slope value to be used

Return

T or NIL

Example

Remarks

the slope value only applies to slope rule based grading entities;
see ETinSlopeFormat and (tingr:set-slopeformat) for the slope format;
see (tingr:get-slope)