Functions

Relations that uniquely associate elements from one set to another.

In mathematics, functions are relations that uniquely associate each element of one set with exactly one element of another set.

/ˈfʌŋkʃən/

The term 'function' was introduced by Gottfried Wilhelm Leibniz in the late 17th century.

Functions are like machines that take something in, do something to it, and give you a different thing out.

What is a function? A relation that uniquely associates elements from one set to another
How are functions used? They're fundamental in mathematics and computer science
Can a function have multiple outputs for one input? No, functions must have only one output for each input

relation mapping

linear function quadratic function exponential function

mathematics