Yesterday, in the 30XL30D challenge, we identified cell contents with the **TYPE function**, and used it to check for a number, before multiplying.

For day 22 in the challenge, we'll examine the N function. It's similar to the T function that we saw earlier, but checks for numbers instead of text.

NOTE: You can have all of the 30 Functions content in an easy-to-use single reference file -- the 30 Excel Functions in 30 Days eBook Kit ($10).

So, let's take a look at the N information and examples, and if you have other tips or examples, please share them in the comments.

### Function 22: N

The N function returns a value converted to a number.

### How Could You Use N?

The N function has limited use, and can usually be replaced by a different function or operator. You can:

- Return number based on a cell's value
- Use N function alternatives
- Add a hidden note in a cell

### N Syntax

The N function has the following syntax:

**N(value)**- value can be text, number, or any other value

### N Traps

If the value is an error, the N function returns the same error, instead of a number. Use IFERROR or ISNUMBER to handle the errors.

### Example 1: Return a Number Based on Cell Value

With the N function, you can return a number, based on a cell's value. If the value is a number, then that number is returned.

**=N(C3)**

This table shows the result of other values in the N function.

### Example 2: N Function Alternatives

Instead of the N function, you can use ISNUMBER to test for numbers.

**=ISNUMBER(C3)**

Or use two minus signs (double unary) to convert TRUE/FALSE or text numbers to numbers.

**=IFERROR(–C3,"")**

### Example 3: Add Hidden Note to Cell

If you want to add a hidden note in a cell, you can use the N function. Because the result of a text value in the N function is zero, adding this note won't affect the cell result.

The note will only be visible in the formula bar, when the cell is selected.

**=SUM(B3:C3) + N("Store01 closed in June")**

### Download the N Function File

To see the formulas used in today's examples, you can download the **N function sample workbook**. The file is zipped, and is in Excel 2007 file format.

### Watch the N Video

To see a demonstration of the examples in the N function sample workbook, you can watch this short Excel video tutorial.

YouTube link: **Return Cell Value as Number with Excel N Function**

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I love the "hidden comment" approach! I hadn't seen that before.

Do you have any more thoughts on using N() vs using -- (double unary)? Is it better to use one versus the other? Are there compatibility issues with other programs or prev versions of Excel?

N and double unary do separate things – i.e. the former does not explicitly coerce.

Say you have 2 cells (A1,B1) and you wish to subtract B1 from A1 but B1 may or may not contain a number

=A1-B1

would be susceptible to #VALUE! error

=A1-N(B1)

would not – nor for that matter would A1-SUM(B1)

edit: to clarify the above (for the pedants) – we are assuming that A1 is always numeric and that neither A1 nor B1 would ever contain underlying error values...

If you like the hidden note using =n(), then you may like the hidden note using text:

="Due date: " & text(a1,"mmmm dd, yyyy")

& text("they never pay on time!",";;;")

Or should this be held until the =text() function????

Thanks BDT, and thanks Luke, for answering the question.

Dave, the poor TEXT function didn't get enough votes to be included, so thanks for your example!

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