Solution Review: Pure Function
Explore the concept of pure functions in JavaScript functional programming. Understand how pure functions depend solely on inputs, avoid side effects, and always return outputs. This lesson reviews code examples to help you identify pure and impure functions, preparing you for interview questions on this topic.
We'll cover the following...
Question 1: Solution review #
Explanation #
Pure functions are functions that take inputs and return the output value without affecting any variable outside of their scope. This means they don’t have any side effects on any of the data outside their scope. Hence, Option A is correct.
These functions must return a value, so Option B is incorrect. The return value must depend on the input arguments passed. Hence, Option C is correct.
Since Option B is incorrect, this means Option D is also incorrect.