Microsoft Office Tutorials and References
In Depth Information
Ways to Enter a Function into a Formula
sometimes known as nesting functions. Excel starts by evaluating the most deeply nested
expression and works its way out. Note this example of a nested function:
The RADIANS function converts degrees to radians, the unit used by all of the Excel
trigonometric functions. If cell B9 contains an angle in degrees, the RADIANS function converts it to radians
and then the SIN function computes the sine of the angle.
A formula can contain up to 64 levels of nested functions — a limit that will probably never be a
factor.
Arrays as arguments
A function can also use an array as an argument. An array is a series of values separated by a
comma and enclosed in brackets. The formula below uses the OR function with an array as an
argument. The formula returns TRUE if cell A1 contains 1, 3, or 5.
=OR(A1={1,3,5})
Often, using arrays can help simplify your formula. The formula below, for example, returns the
same result but uses nested IF functions instead of an array:
=IF(A1=1,TRUE,IF(A1=3,TRUE,IF(A1=5,TRUE,FALSE)))
Ways to Enter a Function into a Formula
You can enter a function into a formula by typing it manually, by using the Function Library
commands, or by using the Insert Function dialog box.
Entering a function manually
If you’re familiar with a particular function — you know its correct spelling and the types of
arguments that it takes — you may choose to simply type the function and its arguments into your
formula. Often, this method is the most efficient.

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