# Inserting Dashes between Letters and Numbers

Please Note: This article is written for users of the following Microsoft Excel versions: 97, 2000, 2002, and 2003. If you are using a later version (Excel 2007 or later), this tip may not work for you. For a version of this tip written specifically for later versions of Excel, click here: Inserting Dashes between Letters and Numbers.

Let's say you have a worksheet with lots of product codes in column A. These codes are in the format A4, B12, AD4, etc. Due to a change in the way your company operates, you are directed to change all the product codes so they contain a dash between the letters and the numbers.

There are several ways you can perform this task. If the structure of your product codes is consistent, then inserting the dashes is a snap. For instance, if there will always be a single letter followed by numbers, then you could use a formula such as this:

```=LEFT(A1,1) & "-" & RIGHT(A1,LEN(A1)-1)
```

Chances are good that your data won't be structured, meaning you could have one or two letters followed by up to three digits. Thus, both A4 and QD284 would both be valid product codes. In this case, a solution formula takes a bit more creativity.

One way to handle it is with an array formula. Consider the following formula:

```=REPLACE(A1,MATCH(FALSE,ISERROR(1*MID(A1,ROW(INDIRECT("1:100")),1)),0),0,"-")
```

If values are in A1-A10, you can put this formula into B1, and then copy it down the column. Since it is an array formula, it must be entered by pressing Ctrl+Shift+Enter. The formula finds the location of the first number in the cell and inserts a dash before it.

Assume, for the sake of example, that cell A1 contains BR27. The innermost part of the formula, INDIRECT("1:100"), converts the text 1:100 to a range. This is used so that inserting or deleting rows does not affect the formula. The next part of the formula, ROW(INDIRECT("1:100")), essentially creates an array of the values 1-100: 1,2,3,...,99,100. This is used to act on each character in the cell.

The next part, MID(A1,ROW(INDIRECT("1:100")),1), refers to each individual character in the string. This results in the array: "B", "R", "2", and "7". Multiplying the array by 1 (the next part of the formula) results in each of the individual characters being converted to a number. If the character is not a number, this conversion yields an error. In the case of the string being converted (BR27), this results in: #VALUE, #VALUE, 2, and 7.

The next step is to apply the ISERROR function to the results of the multiplication. This converts the errors to TRUE and the non-errors to FALSE, yielding TRUE, TRUE, FALSE, and FALSE. The MATCH function looks in the array of TRUE and FALSE values for an exact match of FALSE. In this example, the MATCH function returns the number 3, since the first FALSE value is in the third position of the array. At this point, we essentially know the location of the first number in the cell.

The final function is REPLACE, which is used to actually insert the dash into the source string, beginning at the third character.

As you can tell, the formula to perform the transformation can be a bit daunting to decipher. For those so inclined, it may be easier to just create a user-defined function. The following macro is an example of one that will return a string with the dash in the proper place:

```Function DashIn(myText As String)
Dim i As Integer
Dim myCharCode As Integer
Dim myLength As Integer

Application.Volatile
myLength = Len(myText)
For i = 1 To myLength
myCharCode = Asc(Mid(myText, i, 1))
If myCharCode >= 48 And myCharCode <= 57 Then
Exit For
End If
Next i
If i = 1 Or i > myLength Then
DashIn = myText
Else
DashIn = Left(myText, i - 1) & "-" _
& Mid(myText, i, myLength - 1)
End If
End Function
```

The macro examines each character in the original string, and when it finds the first numeric character, it inserts a dash at that point. You would use the function in this way:

```=DashIn(A1)
```

ExcelTips is your source for cost-effective Microsoft Excel training. This tip (2613) applies to Microsoft Excel 97, 2000, 2002, and 2003. You can find a version of this tip for the ribbon interface of Excel (Excel 2007 and later) here: Inserting Dashes between Letters and Numbers.

Related Tips:

Comprehensive VBA Guide Visual Basic for Applications (VBA) is the language used for writing macros in all Office programs. This complete guide shows both professionals and novices how to master VBA in order to customize the entire Office suite for their needs. Check out Mastering VBA for Office 2010 today!

 *Name: Email: Notify me about new comments ONLY FOR THIS TIP Notify me about new comments ANYWHERE ON THIS SITE Hide my email address *Text: *What is 5+3 (To prevent automated submissions and spam.)

Willy Vanhaelen    04 Oct 2015, 11:50
@Rick Rothstein,

This is a very clever solution!
You can even make it a 'one liner' by removing 'Application.Volatile' which isn't really necessary.
Rick Rothstein    03 Oct 2015, 11:16
Below is a shorter way to write the DashIn UDF that you posted. The only difference in output between our UDF's is that when an error occurs, your UDF outputs #N/A whereas mine outputs #VALUE!

<pre>
Function DashIn(myText As String)
Application.Volatile
DashIn = Application.Replace(myText, InStr(myText, Val(StrReverse(myText)) Mod 10), 0, "-")
End Function
</pre>

# Our Company

Sharon Parq Associates, Inc.

# Our Sites

Tips.Net

Beauty and Style

Cars

Cleaning

Cooking

ExcelTips (Excel 97–2003)

ExcelTips (Excel 2007–2016)

Gardening

Health

Home Improvement

Money and Finances

Organizing

Pests and Bugs

Pets and Animals

WindowsTips (Microsoft Windows)

WordTips (Word 97–2003)

WordTips (Word 2007–2016)

Excel Products

Word Products

# Our Authors

Author Index

Write for Tips.Net