A whole number is a number that does not contain a fractional or decimal component. It can be any positive or negative number, including ZERO. The term 'whole number' is often used interchangeably with the terms 'DIGIT' (5 letters), 'INTEGER' (7 letters), and 'COMPLEMENT' (10 letters). DIGIT refers to any single numerical symbol, such as 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9. INTEGER is a number without a fractional or decimal component, such as -3, -2, -1, 0, 1, 2, 3, etc. COMPLEMENT is a number that when added to another number results in a sum of ZERO, such as -3 3 = 0. Finally, ZERO (4 letters) is a whole number that is neither positive nor negative.