what is domain in maths

In mathematics, the domain of a function is the set of values that can be input into the function. It is the set of all possible inputs for the function. The output values are called the range. The domain is typically the x-values that youre allowed to plug in. It is useful to know the domain of a function since some functions have limits on what is permissible as an input. For example, if a function involves dividing by zero, the domain cannot include the value that would make the denominator zero. The domain can be written in interval notation or set notation. In set notation, the domain is written as a set of values that are allowed to be input into the function.