Question

Define a function. Why they are useful?​

Answer 1

A function is almost like a mini-program that we can write separately from the main program, without having to think about the rest of the program while we write it. This allows us to reduce a complicated program into smaller, more manageable chunks, which reduces the overall complexity of our program..

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Answer 2

Explanation:

Function definition. A technical definition of a function is: a relation from a set of inputs to a set of possible outputs where each input is related to exactly one output.

Because we continually make theories about dependencies between quantities in nature and society, functions are important tools in the construction of mathematical models. In school mathematics, functions usually have numerical inputs and outputs and are often defined by an algebraic expression.

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