👉 In mathematics, the term "retorn" is used to denote a function or operation that returns its input value. It's often used in programming to define functions that return their output values. For example, if you have an array of numbers and you want to find the sum of all the elements in it, you can define a function like this: ```python def sum_array(arr): return sum(arr) ``` In this case, `sum_array` is a function that takes an
