Number Magic

Question :
What is the actual use of Zero in the Number System ?

Answer :
Zero is used as a place holder when there is no frequency to record in a place in a number.
For Example,
In the 809 0 holds ten's place, showing that there were no tens to record in the number.
Zero is the symbol which makes it possible to show values in our number system without the use of an artificial means to identify place value.
Zero is an even number. 0 is neither positive nor negative.