def largest$\_$factor$($n$)$:

$"""$Return the largest factor of n that is smaller than n$.$

$>>>$ largest$\_$factor$(15)$ # factors are $1,3,5$

$5$

$>>>$ largest$\_$factor$(80)$ # factors are $1,2,4,5,8,10,16,20,40$

$40$

$"""$

$"***$ YOUR CODE HERE $***"$