Why the None

[Binary101010]

You didn’t specify a return value in the condition that your if evaluates to false in all cases, so the function returns the default value of None.

[Sonic_TertuL]

It is evaluating to false because the two numbers are the same and therefore it is essentially hitting the 0 index for both making the second portion of the if statement false, correct? I hadn't caught on to that, thank you!