Excel VBA Double Data Type
VBA Double is a kind of data type we assign to declare variables, which is an improved or longer version of the “Single” data type variable and is usually used to store longer decimal places.
Integer data type in VBA always converts decimal values to the nearest integer value, the single data type can show up to two digits of decimal places. On the other hand “Double” data type can store values from -1.79769313486231E308 to -4.94065645841247E324 for negative values and for positive numbers it can store values from 4.94065645841247E-324 to 1.79769313486232E308.
More importantly, it consumes 8 bytes of memory.
Before we see the example of “Double” data type let’s look at the example codes of “Integer” and “Single” data type in VBA. Look at the below VBA code.
Sub Integer_Ex() Dim k As Integer k = 2.569999947164 MsgBox k End Sub
I have declared the variable “k” as Integer and for this variable, I have assigned the value as 2.569999947164.
The result is showing as 3 instead of the supplied number of 2.569999947164. The reason because is VBA has converted the number to nearest integer value i.e. 3.
When the decimal value is more than 0.5 then it will convert to next integer value and when the decimal value is less than 0.51 then will convert to below integer value.
Now I will change the data type from Integer to Single.
Sub Integer_Ex() Dim k As Single k = 2.569999947164 MsgBox k End Sub
Run the code through shortcut key F5, and see what number we get this time around.
This time we got the result as 2.57, so this time we got two decimal places. The original value we have assigned was 2.569999947164, so in this case, third, the placed decimal value is 9, so since this is more than 5 it has converted the second place decimal value 6 to 7.
Now change the data type from Single to Double.
Sub Integer_Ex() Dim k As Double k = 2.569999947164 MsgBox k End Sub
Now run the code manually and see how many digits we get in the message box result.
This time got all the decimal values. We can supply up to 14 digits of decimal places under Double data type.
If you supply any value greater than 14 decimal position will be converted to the nearest value. For an example look at the below image.
I have typed 15 decimal places instead of 14, if I hit enter key it will be back to 14 digits only.
Instead of 59 (last two digits), we got 6 i.e. since the last digit is 9 which is greater than 5 previous number 5 is converted to next integer value i.e. 6
Now I will show how to work with cell reference in a worksheet. Below are the numbers I have entered in the worksheet.
Let us initiate capturing the same values to next by using INTEGER data type, SINGLE data type, and DOUBLE type.
Below is the code to retain values from column A to B by using INTEGER data type.
Sub Double_Ex() Dim k As Integer Dim CellValue As Integer For k = 1 To 6 CellValue = Cells(k, 1).Value Cells(k, 2).Value = CellValue Next k End Sub
Let’s run the code through shortcut key F5, to see what values we get in column B.
When we have used Integer as data type we got all the whole numbers i.e. without decimals.
Now I will just change the variable data type from integer to Single.
Sub Double_Ex() Dim k As Integer Dim CellValue As Single For k = 1 To 6 CellValue = Cells(k, 1).Value Cells(k, 2).Value = CellValue Next k End Sub
This code will give below result.
This time we got only two decimal places.
Now changes the data type from single to double.
Sub Double_Ex() Dim k As Integer Dim CellValue As Double For k = 1 To 6 CellValue = Cells(k, 1).Value Cells(k, 2).Value = CellValue Next k End Sub
This will return below result.
We have got exact values from column A.
Things to Remember
- Double is an improved data type of Single data type.
- It can hold up to 14 decimal places.
- It consumes 8 bytes of system memory.
This has been a guide to VBA Double. Here we discuss examples to declare Excel VBA double data type to store longer decimal places along with practical examples and a downloadable template. Below you can find some useful excel VBA articles –