# How to Quickly Determine if VBA isNumeric in 3 Minutes (Excel)

Written by Kasper Langmann

Understanding the functionality of VBA isNumeric in Excel is an essential skill for anyone who works with data. This function allows you to quickly determine whether a value is a number, which can be incredibly useful in a variety of scenarios. Whether you’re a seasoned Excel veteran or a beginner just getting started, this guide will walk you through everything you need to know about using the VBA isNumeric function in Excel.

## Understanding VBA isNumeric

Before we dive into how to use the VBA isNumeric function, it’s important to understand what it is and why it’s useful. VBA, or Visual Basic for Applications, is a programming language that’s used in Excel to automate tasks. The isNumeric function is a specific function within VBA that checks whether a value is a number.

Why is this useful? Consider a scenario where you’re working with a large dataset that includes both numbers and text. If you’re trying to perform calculations on this data, you’ll need to know which values are numbers and which are not. This is where the VBA isNumeric function comes in handy.

### The Syntax of VBA isNumeric

The syntax of the VBA isNumeric function is quite simple. It’s written as follows: IsNumeric(expression). The expression can be any variable or value that you want to check. If the expression is a number, the function will return True. If it’s not a number, the function will return False.

It’s important to note that the VBA isNumeric function considers certain non-numeric values to be numeric. For example, dates are considered to be numeric because they’re stored as numbers in Excel. Similarly, Boolean values (True and False) are considered to be numeric because they’re stored as 1 and 0, respectively.

## How to Use VBA isNumeric in Excel

Now that we’ve covered the basics of what the VBA isNumeric function is and how it works, let’s dive into how to use it in Excel. The process is straightforward and can be broken down into a few simple steps.

### Step 1: Open the VBA Editor

The first step to using the VBA isNumeric function in Excel is to open the VBA editor. You can do this by pressing Alt + F11 on your keyboard. This will open a new window where you can write and run VBA code.

If you’ve never used the VBA editor before, don’t worry. It’s fairly intuitive to use, and you don’t need to be a programming expert to navigate it. Simply look for the window labeled “Immediate” at the bottom of the screen. This is where you’ll enter your VBA code.

### Step 2: Write the VBA Code

The next step is to write the VBA code that will use the isNumeric function. As mentioned earlier, the syntax for this function is IsNumeric(expression). Replace “expression” with the value or variable that you want to check.

For example, if you want to check if the value in cell A1 is a number, you would write the following code: IsNumeric(Range(“A1”).Value). If the value in cell A1 is a number, this code will return True. If it’s not a number, it will return False.

### Step 3: Run the VBA Code

The final step is to run the VBA code. You can do this by pressing Enter on your keyboard. The result of the isNumeric function will appear in the Immediate window.

That’s all there is to it! Using the VBA isNumeric function in Excel is a simple process that can save you a lot of time and effort when working with data.

## Common Mistakes and Troubleshooting

While the VBA isNumeric function is relatively straightforward to use, there are a few common mistakes that you should be aware of. Understanding these potential pitfalls can help you avoid them and use the function more effectively.

### Mistake 1: Not Understanding What isNumeric Considers to be Numeric

As mentioned earlier, the VBA isNumeric function considers certain non-numeric values to be numeric. This includes dates and Boolean values. If you’re not aware of this, it can lead to confusion and incorrect results. Always keep in mind what the function considers to be numeric when using it.

### Mistake 2: Not Properly Referencing Cells

When using the VBA isNumeric function to check the value of a cell, it’s important to properly reference the cell. This means using the Range object and the Value property, as in the example code provided earlier. If you don’t properly reference the cell, the function may not work as expected.

### Mistake 3: Not Checking the Result of the Function

Finally, it’s important to check the result of the isNumeric function. The function will return True if the expression is a number and False if it’s not. Make sure to check this result and use it in your calculations or data analysis.

By avoiding these common mistakes and understanding how to use the VBA isNumeric function effectively, you can greatly enhance your data analysis and manipulation capabilities in Excel.

## Conclusion

The VBA isNumeric function is a powerful tool for anyone who works with data in Excel. By understanding what it is, how it works, and how to use it, you can quickly and easily determine whether a value is a number. This can save you time, reduce errors, and make your data analysis tasks much easier.

Whether you’re a seasoned Excel veteran or a beginner just getting started, mastering the VBA isNumeric function is a valuable skill that can help you get the most out of Excel. So why wait? Start using the VBA isNumeric function today and see the difference it can make in your work!