Which category does a SAS function NOT belong to?

The category that a SAS function does not belong to is text formatting. In SAS, functions are typically classified into various groups based on their primary functionality.

Trigonometric functions include those that perform operations on angles and return trigonometric values, such as sine and cosine. Mathematical functions encompass a wide range of arithmetic operations and calculations, such as square root and logarithm functions. Financial functions, on the other hand, are specifically designed to process financial calculations, like present value and future value.

Text formatting functions, however, do not fall into a distinct category often discussed as a major group of functions in SAS. While there are functions that manipulate or format character strings (such as SUBSTR or TRIM), they are not traditionally grouped into a standalone category like the others mentioned above. Therefore, while SAS indeed has functions that relate to text, the term "text formatting" isn't recognized as a primary category within the common groups of functions provided in the base SAS.