Roman & Datedif function

Roman

The Roman function converts a number to Roman format.

=Roman(9) = IX

1	I
2	II
3	III
4	IV
5	V
6	VI
7	VII
8	VIII
9	IX
10	X

Datedif

This function calculates the difference between two dates in a variety of interims like number of years, months or days.

=DATEDIF(Start Date, End Date, Interim)

Here the Start Date must be less than the End Date and interim could be m for months, d for days and y for years.

And the if we are using the interim text directly in the formula then it should be in double quotes