_max(i1: int, i2: int): int

Returns the greater of i1 and i2.

_max(0, 1) == 1
_max(12, 45) == 45

_min(i1: int, i2: int): int

Returns the lesser of i1 and i2.

_min(0, 1) == 0
_min(12, 45) == 12