What function gives the date/time of now?

The function that provides the current date and time is Now(). This function dynamically fetches the precise moment when it is called, returning a date/time value that reflects the exact current system time. It is particularly useful for timestamping records or executing calculations that rely on the present moment.

In contrast, the other options do not serve this purpose. For instance, Today() typically returns only the current date (without time) and therefore lacks the time component that Now() supplies. Nowdtc() and Dtnow() are not standard functions in Quickbase; thus, they do not fulfill the requirement of capturing the current date and time. Therefore, the advantage of using Now() lies in its ability to offer a complete date/time representation, making it the correct choice for this question.