Indian Numeral System
The Indian numeral system (or the system of numeration) is a writing system adapted in India for expressing numbers. It is a mathematical notation for representing numbers of a given set, using digits or other symbols in a consistent manner. This numeral system comprises a set of numerals formed by 10 symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.
Long before numbers were invented, a unique mark was made on each item being counted. This was a complex system for writing large numbers. It was realized that there was a need to adopt a standard system of counting. This is how the numeral system came into existence. Different numeral systems were used across different countries and periods. The system adopted in India came to be known as the Indian numeral system.
1.  What is the Indian Numeral System? 
2.  Number Names in the Indian Numeral System 
3.  Difference between International and Indian Numeral System 
4.  FAQs on Indian Numeral System 
What is the Indian Numeral System?
The Indian numeral system contains numerals that are used to represent the numbers using a set of symbols. This system can be distinguished from the other numeral systems based on the nomenclature followed for different place values. When we use the Indian numeral system, we count with ones, tens, hundreds, thousands, ten thousands, lakhs, ten lakhs, and crores.
The following table depicts the different periods and places according to the number of digits in a number.
Use of Separators
According to the Indian numeral system, separators (comma) are used after every period while representing a number in its standard numeral form. For example, the number 384756182 can be better represented as 38,47,56,182 in the standard Indian numeral system form using separators after every period.
Number Names in the Indian Numeral System
The number names in the Indian numeral system depend upon the nomenclature for different place values of digits in the number. While writing number names of the numerals in the Indian system, we should consider the following points:
 According to the Indian numeral system, separators are marked to distinguish different periods.
 Therefore, while writing the number names, these periods can be used to read the different place values in the number.
 Using these place values, we can write the number names accordingly.
For example, the number name for 38,47,56,182 is written as thirtyeight crore, fortyseven lakh fiftysix thousand, one hundred and eightytwo.
The following figure shows how to write the number name for 38,47,56,182, with the help of the Indian place value chart. We read the number according to the place values of all the digits given here.
So, we concluded that it is easy to read any large number if we place the number in the Indian place value chart of the Indian numeral system.
Difference between International and Indian Numeral System
The main difference between the Indian and international numeration system is the placement of the separators (commas) and the nomenclature of different place values. The International numeral system is used worldwide. When we count in terms of ones, hundreds, thousands, ten thousands, hundred thousands, millions, and billions, we are referring to the International numeral system. The following table depicts different places and periods according to the number of digits in a number.
The following table highlights the differences between the Indian and the International numeral system.
Indian Numeral System  International Numeral System 

Nine places are grouped into four periods: ones, thousands, lakhs, and crores.  Nine places are grouped into three periods: ones, thousands, and millions, and further into billion and so on. 
Place Values: Ones, tens, hundreds, thousands, ten thousand, lakhs, ten lakhs, crores, and ten crores.  Place Values: Ones, tens, hundreds, thousands, ten thousand, hundred thousand, millions, ten million and hundred million 
Lakhs and crores are Indians units in the Indian Numeral System.  Millions and billions are international units in the International Numeral System. 
For example: Rewrite the number 1347823 in the International numeral system and the Indian numeral system, using commas. How will you read this number according to both the systems?
Solution:
In the International numeral system, we begin from the right side and insert commas after every three digits. We divide the number into periods and read the period separately.
Standard International numeral form: 1,347,823
Number Name: One million, three hundred fortyseven thousand, eight hundred and twentythree.
The same given number, 1347823, can be written in the Indian numeral system, in the following way:
Standard Indian numeral form: 13,47,823
Number Name: Thirteen lakh, Fortyseven thousand, eight hundred and twentythree.
Solved Examples on Indian Numeral System

Example 1: Rewrite the number 2687393 by placing the commas as per the Indian numeral system.
Solution:
In the Indian numeral system, we use commas as separators to mark different periods. We, thus, insert a comma after each period.
 Starting from the right side of the number, the first comma is inserted after the hundreds digit.
 The second comma is inserted after the thousands period, that is after 2 places from the first comma.
 The third comma is inserted after the lakhs period.
Therefore, as per the Indian numeral system, the given number 2687393 is written as 26,87,393.

Example 2: How will the number 2,34,32,829 be read out according to the Indian numeral system?
Solution:
The number 2,34,32,829 will be read as "Two crore, thirtyfour lakh, thirtytwo thousand eight hundred and twentynine".
FAQs on Indian Numeral System
What are the Indian Numerals?
Indian numerals consist of 10 symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9. These symbols came into existence during the 6^{th} or 7^{th} century in India and are used in the Indian numeral system (or system of numeration) for expressing numbers.
What is the Indian Number System in Maths?
The Indian numeral system (or system of numeration) is a writing system adapted in India for expressing numbers. It is a mathematical notation for representing numbers of a given set, using digits or other symbols in a consistent manner. In the Indian number system, the place values of digits are read in the order of Ones, Tens, Hundreds, and so on, based on the nomenclature of the different periods.
What are Number Names in the Indian Numeral System?
When numbers are expressed in the form of words, the representation is termed as its number name. In the Indian numeral system, the number names depend on the different place values of digits in the number.
For example, the number name for 38,47,56,182 is written as Thirtyeight crore, fortyseven lakh, fiftysix thousand, one hundred and eightytwo.
What are the Differences Between the Indian Numeral System and the International Numeral System?
The differences between the Indian and the International numeral system are given as follows:
 In the Indian numeral system, nine places are grouped into four periods: ones, thousands, lakhs, and crores. While, in the International number system nine places are grouped into three periods: ones, thousands, and millions, followed by period billion and so on.
 In the Indian numeral system, place values are marked as ones, tens, hundreds, thousands, ten thousand, lakhs, ten lakhs, crores, and ten crores. While, in the International numeral system, place values are marked as ones, tens, hundreds, thousands, ten thousand, hundred thousand, millions, ten million, and hundred million, and so on.
 The use of separators is different for both the Indian and International numeral systems, depending upon the periods.
How are Numerals Written in the Indian System?
The numbers in the Indian numeral system are separated by commas (separators) after every period, as defined by this system. Starting from the right end, the first comma is placed just before the digit at the Hundreds place, the next comma is placed just before the digit at Ten thousands place, followed by the digit after Ten Lakhs, and so on. For example, the number 781700182 is written as 78,17,00,182.
How do you Write Number Names in the Indian Numeral system?
While writing number names, we should know the place value of each digit according to the Indian place value system. The separators (commas) help us to read the place values of the numbers as we start writing them from left to right. So, start writing the name of the period after each number in the period. Skip the period which has zeros at all places.
For example, the number name for 41,27,56,082 is written as fortyone crore, twentyseven lakh, fiftysix thousand, and eightytwo.
What Comes after 10 crores in the Indian System?
The place value that comes after 10 crores is 100 crores or 1 Arab.