The LOWER-CASE function returns a character string that is the same length as argument-1 with each uppercase letter replaced by the corresponding lowercase letter. The type of this function is alphanumeric.
Usage
FUNCTION LOWER-CASE (argument-1)
Parameters
Argument-1 must be class alphabetic or alphanumeric, and must be at least one character in length.
Returned Values
1. The same character string as argument-1 is returned, except that each uppercase letter is replaced by the corresponding lowercase letter.
2. The character string returned has the same length as argument-1.
3. If the computer character set does not include lowercase letters, no changes take place in the character string.
4. This function is similar to the library routine C$TOLOWER except that the original data is not modified, and the entire string is converted.