Which function returns a valid value without any arguments?

TODAY

SQRT

COUNT

ROUND

NOW

TODAY and NOW function returns valid value without any arguments.

Explanation:

All the listed functions are used in MS Excel, their functionality is defined below:

TODAY () function is a built-in function that gives the date of current function. It can also be used as a worksheet (WS) function. Every time we use a TODAY () function, the system will refresh the date before recalculated by worksheet. SQRT () function works by returning the square root of a value given in the parenthesis as argument. COUNT () function gives the number of entries present in a specific range given as argument to it. ROUND () function will round the number given to it to the nearest decimal. NOW () function is also a date/time function, which specifies the current system date and time.