Which character is not allowed in the name of an ABAP class?

In ABAP, the naming conventions for classes and other programming entities have specific rules to ensure compatibility and correct functionality within the programming environment. The character that is not allowed in the name of an ABAP class is the dollar sign ($).

In traditional programming languages, certain special characters can carry specific meanings or functions, and the dollar sign is not included in the valid character set for class names in ABAP. Class names must start with a letter (A-Z, a-z) and can be followed by letters, numbers (0-9), and underscores (_), but the inclusion of special characters like the dollar sign is prohibited.

The other characters—8, _, and %—are permissible in class names. The underscore can be used to separate words in long names, while numbers may be used, provided they don’t start the name. The percentage symbol is also valid, although its use might be less common in class identifiers. Understanding these naming conventions helps developers create compliant and functional ABAP code effectively.