👉 In mathematics, a piecewise function is a function that takes an input and returns multiple outputs. It can be defined as a function that takes two or more inputs and returns one or more values for each input value, depending on whether it falls into certain categories (e.g., positive, negative, etc.). The output of a piecewise function depends on the values of its input parameters. For example, consider the following piecewise function: ``` f(x) = { x < 0