What Does Underflow Mean?
Underflow is a condition which occurs in a computer or similar device when a mathematical operation results in a number which is smaller than what the device is capable of storing. It is the opposite of overflow, which relates to a mathematical operation resulting in a number which is bigger than what the machine can store. Similar to overflow, underflow can cause significant errors.
Techopedia Explains Underflow
Underflow can be considered a representational error and occurs mostly while dealing with decimal arithmetic. It mostly occurs when two negative numbers are added and the result is out of range for the device to store.
