What is the official Indian numbering system?It is not clear to me if the Indian numbering system using the units like lakh, crore, arab etc. are used throughout the India or not? For example how the number 'nine crore, seventeen lakh, fifteen thousand, seven hundrend and fifty five is practically referred in different states of India?
Do in official organizations like banks and Government offices etc. the said number is described in the manner stated above or there are other systems in various regional languages.
What is the official Indian numbering system?