Breakpoint conditions support literals as operands. As you are already familiar with from ABAP syntax, the following types of literals are also valid in breakpoint conditions:
Character literals are identified by single quotes, for example:
‘This is a type C literal’
Character literals have the ABAP type C.
String literals are identified by back quotes, for example:
`This is a string`
String literals have the ABAP type STRING.
123456789
-123456789
Numeric values in the range of -2147483648 … 2147483647 have the ABAP type I, while all other numeric values in the range of -9999999999999999999999999999999 ... 9999999999999999999999999999999 have the ABAP type P.