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The Indian numbering system is used in Indian English and the Indian subcontinent to express large numbers. Commonly used quantities include lakh (one hundred thousand) and crore (ten million) – written as 1,00,000 and 1,00,00,000 respectively in some locales. [1]
Crore (/ k r ɔːr /; abbreviated cr) denotes the quantity ten million (10 7) and is equal to 100 lakh in the Indian numbering system. In many international contexts, the decimal quantity is formatted as 10,000,000, but when used in the context of the Indian numbering system, the quantity is usually formatted 1,00,00,000.
The Hindu–Arabic system is designed for positional notation in a decimal system. In a more developed form, positional notation also uses a decimal marker (at first a mark over the ones digit but now more commonly a decimal point or a decimal comma which separates the ones place from the tenths place), and also a symbol for "these digits recur ad infinitum".
In South Asia except for Sri Lanka, it is known as the crore. ... 45,086,079 = number of prime numbers having nine digits [31] 45,136,576 = Leyland number using 7 & 9 ...
Numbers from 100 up are more regular. There are numerals for 100, sau; 1,000, hazār; and successive multiples by 100 of 1000: lākh (lakh) 100,000 (10 5), karoṛ ...
Since its inception in 2006, around ₹ 1,10,000 crore (about USD$25 billion) has gone directly as wage payment to rural households and 1200 crore (12 billion) person-days of employment has been generated. On an average, 5 crore (50 million) households have been provided employment every year since 2008.
An important reason for grouping is that it allows rapid judgement of the number of digits, via telling at a glance ("subitizing") rather than counting (contrast, for example, 100 000 000 with 100000000 for one hundred million).
Different cultures used different traditional numeral systems for naming large numbers.The extent of large numbers used varied in each culture. Two interesting points in using large numbers are the confusion on the term billion and milliard in many countries, and the use of zillion to denote a very large number where precision is not required.