Pure &Impure functions

Question

Hey, i didn't really understand what's the differents between pure and impure functions. can anyone help?

Answer 1

Pure functions do not change state

Whereas impure functions change state

https://www.sololearn.com/learn/JUMP_LINK__&&__Python__&&__JUMP_LINK/2459/

Answer 2

An impure function mutates variables/state/data outside of it’s lexical scope.

Pure functions don’t modify external variables/state/data outside of the scope, and returns the same output given the same input.