LT Less Than Relational Operator MASM Operator expression1 LT expression2 Returns true (0FFFFh) if expression1 is less than expression2, otherwise returns false (0000h). Notes: The expressions must resolve to absolute values. This operator treats its operands as 17-bit numbers. The 17th bit specifies the sign bit, thus the largest number possible is 0FFFFh (65,535). Seealso: