What result comes from adding or subtracting a whole number from a date value?

When you add or subtract a whole number from a date value, the result is that the date moves forward or backward by the specified number of days. This operation utilizes the underlying concept that dates can be manipulated like numbers where each whole number represents a day.

For example, if you take a date of January 1st and add 5, the resulting date will be January 6th. Conversely, if you subtract 3 from January 5th, you will arrive at January 2nd. This allows for straightforward calculations of date intervals in applications such as scheduling and planning, which is essential for effective date handling in various software like Kinaxis RapidResponse.

The other options do not accurately reflect the behavior of date values concerning arithmetic operations. The date will not remain unchanged, it does not convert to a string format, and it doesn't become invalid unless the operation yields a date outside the acceptable range in specific systems. These outcomes clarify why the correct response pertains to how a whole number affects a date directly in terms of day movement.