The difference between return and print in Python

Before encountering this problem, try to compare several different results and summarize the difference between return and print.

Summarize:

One of the functions of return is returning the calculated value
Print works by outputting data to the control side

Nothing is output in the first result;
In the fourth result, print Peven(n)   whose return value is None.

As a result, print prints the results to the console, and the return returned results cannot be printed to the console (that is, they cannot be printed directly).

The difference between return and print in Python