What is the difference between pure and impure functions?
Pure functions always produce the same output for the same input and have no side effects. Impure functions may vary.
Can you give me an example of a pure function?
Sure! A function that adds two numbers together, like add(a, b)
, is pure because it always returns the same result.
What about an example of an impure function?
An example of an impure function is one that fetches data from an API. Its output can change based on external data.
Why are pure functions preferred in programming?
Pure functions are easier to test, debug, and reason about, making code more predictable and maintainable.
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