 A period or dot is used to denote the decimal separator, which separates the integral and the fractional parts of a decimal number.When writing large numbers with many digits, commas are used as delimiters to group digits, indicating the thousand (হাজার "hazar"), the hundred thousand or lakh (লাখ "lakh" or লক্ষ "lôkkhô"), and the ten million or hundred lakh or crore (কোটি "koti") units.In other words, leftwards from the decimal separator, the first grouping consists of three digits, and the subsequent groupings always consist of two digits.