VBA's 'As Double': An Easy-to-Follow Guide

Visual Basic for Applications (VBA) offers a range of tools that can supercharge Excel's capabilities. One such tool is the data type 'As Double', pivotal for computations that require high precision.

What is 'As Double'? In VBA, the 'Double' data type is designed to store very large or small numbers with a high degree of precision. When a variable is declared 'As Double', it can accommodate values between -1.79769313486231570E+308 to -4.94065645841246544E-324 for negative numbers and 4.94065645841246544E-324 to 1.79769313486231570E+308 for positive numbers.

Using 'As Double' in VBA: Step-by-Step

Step 1: Launch VBA Editor

• Open Excel.
• Press Alt + F11 to open the VBA Editor.

Step 2: Insert a New Module

• Within the VBA Editor, go to Insert > Module.

Step 3: Declare and Use 'As Double'

• Now, you can declare your variable as 'As Double'. Here's an example:

Sub DoubleCalculation()
    Dim length As Double
    Dim width As Double
    Dim area As Double

    length = 9.67
    width = 5.25
    area = length * width

    MsgBox "The area of the rectangle is " & area
End Sub

In the example provided, we've declared length, width, and area as 'As Double'. The code calculates the area of a rectangle and presents the result in a message box.

Step 4: Close & Run

• Exit the VBA Editor.
• Back in Excel, you can now execute the DoubleCalculation macro.

Note: Grasping the 'As Double' data type is essential when you're working with numbers in VBA that require utmost precision or when dealing with values that are extremely large or minuscule.

For an in-depth understanding of other VBA data types, consider exploring this link.

This guide acquainted you with the 'As Double' data type in VBA, enabling you to handle highly precise or significantly large/small numbers effectively.