Q BASIC PROGRAM TO FIND AREA OF 4 WALLS. FUNCTION

DECLARE FUNCTION AREA(L,B,H)
CLS
INPUT "ENTER LENGTH";L
INPUT "ENTER BREADTH";B
INPUT "ENTER HEIGHT';H
PRINT "AREA OF 4 WALLS=";AREA(L,B,H)
END

FUNCTION AREA(L,B,H)
AREA=2*H*(L+B)
END FUNCTION