Zero represents no quantity. It has the symbol 0.
It is the integer between −1 and 1 and is neither positive nor negative.
Example: 6 − 6 = 0 (the difference between six and six is zero)
• Zero is an even number
• When we add zero to a number the result is just the number, unchanged
• When we multiply a number by zero we get zero
• Division by zero is undefined
Zero is also used as a "place-holder" so that you can write a numeral properly.
Example: 502 (five hundred two) needs zero to show no tens. Without it, 52 would mean fifty-two.