Sizeof indicates the amount of storage, in bytes, associated with a type, variable, parameter or constant.
SizeOf = "sizeof" "(" Expr ")".
dcltrans transaction TMain var nNumber : number; fFloat : float; sString1 : string(12) init "ProductName"; sString2 : string; begin write(sizeof(nNumber)); // --> 4 write(sizeof(fFloat)); // --> 8 write(sizeof(sString1)); // --> 13 write(sizeof(sString2)); // --> 254 write(sizeof("abcde")); // --> 5 end TMain;