It appears that UpCase() and LowerCase() are built in.
There is also a UpperCase() but it’s requires the sysutils library.
The example for LowerCase() includes a “uses sysutils” but it works without it.
So there is an UpCase() AND UpperCase(), but only a LowerCase()…No LowCase()
In looking at an old Pascal program, I wrote a Right() function that returns the rightmost characters in a string. But there is already a RightStr() function…also in sysutils.