The division function is a mathematical operation that involves splitting a number, known as the dividend, into equal parts by another number, known as the divisor, to determine the quotient or the result of the division. It is denoted by the symbol "÷" or "/".

In its simplest form, division can be thought of as the inverse operation of multiplication. For example, dividing 12 by 3 means finding out how many times 3 can be subtracted from 12 evenly, resulting in a quotient of 4 (12 ÷ 3 = 4). Division can also be expressed as a fraction or a ratio. The dividend is typically written as the numerator of the fraction, and the divisor is written as the denominator. For instance, 12 ÷ 3 can be written as the fraction 12/3, which simplifies to 4.It is important to note that division is not always exact. When the dividend cannot be evenly divided by the divisor, a remainder may be left. This is often represented using the modulo operator (%) in computer programming, which returns the remainder of the division.Division has certain properties and rules, such as the fact that dividing by 0 is undefined since it is not possible to divide a number by zero. Additionally, division is not commutative, meaning that changing the order of the dividend and divisor can produce different results.In computer programming, the division function is typically implemented as a built-in operator or as a function/method provided by the programming language, allowing for the division of numerical values.