Zero

The concept of zero as a number and not merely a symbol or an empty space for separation is attributed to India, where, by the 9th century AD, practical calculations were carried out using zero, which was treated like any other number, even in case of division.

In 498 AD, Indian mathematician and astronomer Aryabhata stated that "from place to place each is ten times the preceding, which is the origin of the modern decimal-based place value notation".

Names for the number 0 in English include zero, nought or (US) naught or nil, the epic quest to invent the perfect calendar.

As the decimal zero and its new mathematics spread from India to whole world.There are different words used for the number or concept of zero depending on the context. For the simple notion of lacking, the words nothing and none are often used.Several sports have specific words for zero, such as nil in football, love in tennis and a duck in cricket.It is often called oh in the context of telephone numbers. Slang words for zero include zip, zilch, nada, scratch and even duck egg or goose egg.

The sum of zero and a negative number is negative.

The sum of zero and a positive number is positive.so with out zero there is no mathematics.The number 0 may or may not be considered a natural number, but it is a whole number and hence a rational number and a real number.