Convert any number to uppercase letters (X, Y, Z, AA, AB, AC, ...).
== Description Example == <context source=yes>% convert a number 1-26 to a lowercase letter\character{3} -- \character{30}
% convert a number 1-26 to an uppercase letter
\Character{3} -- \Character{30}
% convert any number to lowercase letters (x, y, z, aa, ab, ac, ...)
\characters{3} -- \characters{30}
== Example ==% convert any number to uppercase letters (X, Y, Z, AA, AB, AC, ...)<!-- Please fill in an example if you can \Characters{3} --\Characters{30}</context>