| Instruction | Subtract |
| Syntax | Subtract Destination, Source1, Source2[, Overflow-Label] |
| Constraints | Destination, Source1, and Source2 are all of the same type |
| Process | Destination := Source1 - Source2 If Overflow Detected Then Go To Overflow-Label |
The Subtract instruction is used to subtract two integral or decimal variables from one another.
The Subtract is in all other ways similar to the Add instruction.