0

The number zero (0 in decimal form), otherwise referred to as none, nothing, naught, nil, and (for some odd reason) love, is the first non negative integer and is also usually defined as the first natural number. It precedes one (1) and follows negative one (-1) on the number line.

Zero is known in basic arithmetic as the additive identity, since the sum of any number n and zero will always equal that same number, n. It is also known in basic arithmetic that any number multiplied by zero will always equal zero.

In counting, zero objects can also be referred to as the complete absence of a particular object - basically, it would denote an empty set in set theory.