In SAS, which option permits reading remaining values from a single line across multiple iterations?

The option that allows reading remaining values from a single line across multiple iterations is indeed the double at sign, represented as "@@." This is commonly used in the DATA step to hold the input line for further processing. When you use "@@", SAS does not advance to the next line after reading the current line. Instead, it retains the line in the input buffer, permitting the program to read additional values from the same line in subsequent iterations of the DATA step.

This behavior is particularly useful when you have a line of data with multiple values that need to be processed in chunks, or when you're working with record formats that require you to read more data points before moving to the next line. With " @@ ", you can control the reading process effectively, ensuring that all the relevant values are captured until the required number of variables has been filled or other conditions in your DATA step are met.

The other options serve different purposes. For example, DSD is used for handling delimited data where consecutive delimiters represent missing values, TRUNCOVER is used to read data lines but prevents rolling over to the next line if the input line is shorter than expected, and "#n" is used for line pointers in the context of formatted input records, where it specifies reading