specifies a character
constant, variable, or expression.
Details
In a DATA step, if the
REVERSE function returns a value to a variable that has not previously
been assigned a length, then that variable is given the length of
the first argument.
The last character in
the argument becomes the first character in the result, the next-to-last
character in the argument becomes the second character in the result,
and so on.
Note: Trailing blanks in the argument
become leading blanks in the result.