You can use identifiers up to 255 characters long. Identifiers must start with an alphabetic character or an underscore. Subsequent characters can be alphanumeric characters or underscores. Do not use spaces.
The following are exceptions:
● Command identifiers can start with numeric characters.
● Test/Task names (not identifiers) can contain any character, including spaces.
Because characters are not case-sensitive, use the case of a letter to make the identifier more readable. For example, use SetFunction as an identifier rather than SETFUNCTION.
For recommendations on naming variables, see Variable Naming Conventions.