1 is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of unit length is a line segment of length 1. In conventions of sign where zero is considered neither positive nor negative, 1 is the first and smallest positive integer. It is also sometimes considered the first of the infinite sequence of natural numbers, followed by 2, although by other definitions 1 is the second natural number, following 0.

  १ - एक  ही पहिली नैसर्गिक संख्या आहे, ती ० नंतरची आणि २ पूर्वीची पूर्णांक संख्या आहे. इंग्रजीत: 1 - one . एक, एकक, एकता, एकरुप,....