What are the benefits of using pure functions in programming?

What are the benefits of using pure functions in programming?

Pure functions are functions that always produce the same output for the same input and have no side effects. This leads to easier testing and debugging.

Can you explain how they help with testing?

Since pure functions are predictable, you can test them in isolation without worrying about external state or side effects, making tests simpler and more reliable.

What about performance? Do pure functions affect that?

Yes, pure functions can improve performance through optimizations like memoization, where results of expensive function calls are cached.

Are there any downsides to using pure functions?

One downside is that they may require more effort to structure your code, especially in cases where side effects are necessary.