What is the correct syntax for the propcase function?

The PROPCASE function is used in SAS to capitalize the first letter of each word in a string while converting the remaining letters to lowercase. The correct syntax includes a variable that represents the string you want to manipulate and an optional delimiter that specifies which characters are treated as word boundaries.

In this case, the proper syntax involves directly referencing a variable that holds the string you wish to format, while the optional delimiter can be used to define the separation between words more explicitly. When using the function without specifying a delimiter, SAS defaults to recognizing spaces as word boundaries, which works effectively for most standard text.

By using the correct syntax with the variable, you ensure that the function can perform its intended operation on the specific data you're working with, making it key to manipulating string variables accurately in your SAS programs.

The other options do not adhere to the proper syntax, as they either incorrectly format the argument types or omit necessary components for the function to execute as intended.