He is the inventor of the Hindu-Arabic numeral that became the backbone of the development of mathematics in future.
Providing appropriate weights to the digits: Place value of the digits in the number can only be determined with the help of zero.
Two zeros preceding the digit indicate hundreds position while a single zero before the number indicates 10s position however leading zeros do not assign place value to the digits.
For example, 2000 can be represented as 2*10^3 in the exponential form.
By counting zeros, it is possible to determine the exponents.