Hi,
from ABAP keyword docu for Literals:
Text string literals
Text string literals are character strings included in single backquotes
(`), which have the data type string. The empty text string literal `` represents a string
of length 0.
To represent a backquote within a text string literal, you must enter two
consecutive backquotes. A text string literal can have a maximum of 255
characters. An empty text string literal is the same as an empty string of
length 0.
...
Regards,
Klaus