Counting is a mathematical behavior of repeatedly adding (or subtracting) 1, which is usually used to calculate how many objects there are or to place the required number of objects (counting the first object from the beginning and corresponding the remaining objects to natural numbers starting from two). In addition, counting can also be used (mainly for children) to learn the knowledge of number and number system. It can be inferred from the present archaeological evidence that the history of human counting is at least 50,000 years, and this development has led to the development of mathematical symbols and counting systems. Ancient culture mainly used counting to record economic data (accounting) such as liabilities and capital.

Counting is also called counting. One of the basic concepts of arithmetic. The process of exponential growth of things. When counting, you usually point to everything one by one, and read the numbers in the column of positive integers 1, 2, 3, 4, 5, which correspond to the things you refer to one by one. This process is called counting. The above method of counting things one by one is called counting things one by one. If you count in groups of several, it is called cluster counting.

The inclusion count is usually used to calculate the number of days in the calendar. Usually, when eight days from Sunday: Monday will be the "first day"

Days ",Tuesday is the second day, and next Monday is the eighth day. In internal calculation, Sunday will be the "first day", so the next Sunday will be the "eighth day". For example, two weeks is quinze jours( 15) in French, and it is similar in Greek (δ ε κ α π ε ε ε θ? μ ε ρ ο) and Spanish (quincena) are also based on the number 15. This habit also appears in other calendars: in the Roman calendar, nones (9) is the first eight days of ides; In the Gregorian calendar, Quinquagesima (Sunday before Lent, meaning 50) is the 49th day before Easter.

Counting sometimes includes numbers other than 1-such as counting money or giving change, or counting in units of two (2, 4, 6, 8, 10, 12, ...) or counting in units of five (5, 10, 65433).