Excel vba if value is a number

This tutorial will teach you how to use the IsNumeric and IsNumber functions in VBA to check if values are numbers.

IsNumeric is a built-in VBA function, while IsNumber is an Excel function which can be called from VBA code.

Difference between IsNumber and IsNumeric in VBA

IsNumber checks if a value is stored as a number. Whereas, IsNumeric checks if a value can be converted into a number.

For example, if you pass a blank cell as a parameter, IsNumber will return FALSE, while IsNumeric will return TRUE. Also, if you pass a cell containing number stored as a text, IsNumber will return FALSE and IsNumeric TRUE.

You need to pay attention to these limitations of both functions and decide in which cases is better to use IsNumeric and when IsNumber.

Using IsNumeric in VBA

IsNumeric is the VBA function which checks if a value is numeric and returns a Boolean TRUE or FALSE as a result.

The function can take a variable or a cell value.

Here is an example of taking a cell value:

If IsNumeric(Sheet1.Range("A1").Value) = True Then
    MsgBox "The value in A1 is numeric"
Else
    MsgBox "The value in A1 is not numeric"
End If

In this example, we check if the value from the cell A1 is numeric using the IsNumeric. This function returns the appropriate message, depending on the result of the function.

This next example perform the same operation, except with a variable instead of a cell value:

Dim n as Variant

n = Sheet1.Range("A1").Value

If IsNumeric(n) = True Then
    MsgBox "The value in A1 is numeric"
Else
    MsgBox "The value in A1 is not numeric"
End If

Using IsNumber in VBA

IsNumber is an Excel Function, which can be used in VBA. It has an almost similar output as IsNumeric. Let’s look at the example of the IsNumber function:

If Application.WorksheetFunction.IsNumber(Sheet1.Range("A1").Value) = True Then

    MsgBox "The value in A1 is numeric"

Else

    MsgBox "The value in A1 is not numeric"

End If

As you can see from the code, the difference is in the syntax when calling the function. Since IsNumber is the Excel function, we need to put Application.WorksheetFunction before the function call.

Метод WorksheetFunction.IsNumber (Excel)

Проверяет тип значения и возвращает значение True или False в зависимости от того, ссылается ли значение на число.

Синтаксис

expression. IsNumber (Arg1)

Выражение Переменная, представляющая объект WorksheetFunction .

Параметры

Имя	Обязательный или необязательный	Тип данных	Описание
Arg1	Обязательный	Variant	Value — значение, которое требуется протестировать. Значение может быть пустым (пустая ячейка), ошибкой, логическим, текстовым, числом или ссылочным значением или именем, ссылающимся на любое из этих значений, которое требуется проверить.

Возвращаемое значение

Boolean

Примечания

Аргументы значений функций IS не преобразуются. Например, в большинстве других функций, где требуется число, текстовое значение 19 преобразуется в число 19. Однако в формуле ISNUMBER(«19») значение 19 не преобразуется из текстового значения, и функция IsNumber возвращает значение False.

Функции IS полезны в формулах для проверки результата вычисления. В сочетании с функцией IF они предоставляют метод для обнаружения ошибок в формулах.

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Using Isnumeric and Isnumber in VBA

In this Article

This tutorial will teach you how to use the IsNumeric and IsNumber functions in VBA to check if values are numbers.

IsNumeric is a built-in VBA function, while IsNumber is an Excel function which can be called from VBA code.

Difference between IsNumber and IsNumeric in VBA

IsNumber checks if a value is stored as a number. Whereas, IsNumeric checks if a value can be converted into a number.

For example, if you pass a blank cell as a parameter, IsNumber will return FALSE, while IsNumeric will return TRUE. Also, if you pass a cell containing number stored as a text, IsNumber will return FALSE and IsNumeric TRUE.

You need to pay attention to these limitations of both functions and decide in which cases is better to use IsNumeric and when IsNumber.

Using IsNumeric in VBA

IsNumeric is the VBA function which checks if a value is numeric and returns a Boolean TRUE or FALSE as a result.

The function can take a variable or a cell value.

Here is an example of taking a cell value:

In this example, we check if the value from the cell A1 is numeric using the IsNumeric. This function returns the appropriate message, depending on the result of the function.

This next example perform the same operation, except with a variable instead of a cell value:

Using IsNumber in VBA

IsNumber is an Excel Function, which can be used in VBA. It has an almost similar output as IsNumeric. Let’s look at the example of the IsNumber function:

As you can see from the code, the difference is in the syntax when calling the function. Since IsNumber is the Excel function, we need to put Application.WorksheetFunction before the function call.

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Функция IsNumeric

Возвращает boolean value, указывающее, выражение можно высмеять как число.

Обязательный аргумент выражениеаргумент является значением типа Variant, содержащим числовое выражение или строковое выражение.

IsNumeric возвращает true, если выражение целиком распознается как число; в противном случае возвращается false.

IsNumeric возвращает false, если выражение является выражение даты.

Примеры запросов

SELECT IsNumeric([UnitPrice]) AS Expr1 FROM ProductSales;

Функция оценивает, является ли значение «UnitPrice» допустимым числом, и возвращает результат «-1» для значения «Истина» и «0» для значения «Ложь» в столбце «Вырасть1». Результат — -1 (Истина).

SELECT IsNumeric([DateofSale]) AS ValidNumber, IsNumeric(«487.34») AS NumberTest FROM ProductSales;

Функция оценивает, является ли «DateofSale» и «487,34» допустимым числом, и возвращает результат «-1» для «Истина» и «0» для ложь в столбцах ValidNumber и NumberTest соответственно. Результат составляет 0 (Ложь) для validNumber и -1(True) для NumberTest.

Пример VBA

Примечание: В примерах ниже показано, как использовать эту функцию в модуле Visual Basic для приложений (VBA). Чтобы получить дополнительные сведения о работе с VBA, выберите Справочник разработчика в раскрывающемся списке рядом с полем Поиск и введите одно или несколько слов в поле поиска.

В этом примере функция IsNumeric используется для определения того, может ли переменная быть оценена как число.

Источник

WorksheetFunction.IsNumber method (Excel)

Checks the type of value and returns True or False depending on whether the value refers to a number.

Syntax

expression.IsNumber (Arg1)

expression A variable that represents a WorksheetFunction object.

Parameters

Name	Required/Optional	Data type	Description
Arg1	Required	Variant	Value — the value that you want tested. Value can be a blank (empty cell), error, logical, text, number, or reference value, or a name referring to any of these, that you want to test.

Return value

Boolean

The value arguments of the IS functions are not converted. For example, in most other functions where a number is required, the text value 19 is converted to the number 19. However, in the formula ISNUMBER(«19») , 19 is not converted from a text value, and the IsNumber function returns False.

The IS functions are useful in formulas for testing the outcome of a calculation. When combined with the IF function, they provide a method for locating errors in formulas.

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IsNumeric VBA Function Checks if Cell is a Number

The VBA Tutorials Blog

Introduction to IsNumeric

The IsNumeric VBA function checks if a cell is a number and expresses the answer as a Logical Boolean ( True or False ). The IsNumeric VBA function is a counterpart to the Excel ISNUMBER function, but the expressions don’t always produce the same results.

This isn’t the first time you’ve seen me use IsNumeric in my VBA macros, but in this tutorial I’ll explain how it’s used and what it’s good for. Let’s get started.

• If IsNumeric thinks your expression is a number, it will return a value of True.
• If it’s not a number, it will return False.

The syntax for the IsNumeric function can’t get any simpler:

As you can see, IsNumeric accepts one argument: an expression of the Variant Data Type. I know, I know. The complicated jargon isn’t necessary.

All you need to know is that IsNumeric can pretty much evaluate anything. A cell, a string, a date, a range. It won’t choke up on any of these, but that doesn’t mean it’ll give you the answer you want.

For example, if you enter a range, like Range(«A1:B5») , into an IsNumeric expression, it will always return False even if all the values in the range ARE numeric. The IsNumeric function won’t loop through each cell in your range and check whether each of them are numeric. You’ll have to do that with a loop of your own, like a For Each loop. I’ll show you a macro that does that in the IsNumeric Examples section.

Because IsNumeric returns True or False, it’s a great expression to include inside If Statements. Let’s take a look at a couple examples.

IsNumeric Examples

Check if a Cell is a Number

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This example macro tests if the value in cell A1 is a number. If it is, the value in cell B1 says it’s a number. Otherwise, it says it’s not a number.

You don’t need to put the = True in the above If Statement, but I included it to make the macro easier to read.

If you have a macro that performs arithmetic expressions, it’s a good practice to use IsNumeric to make sure your input is numeric before performing the math. As a side note, it’s also a good to make sure your input isn’t empty by using the IsEmpty function. That’s another tutorial for another day.

Check if All Cells in a Range are Numeric

The above macro checks each cell in your range and the moment it finds one that isn’t numeric, it exits the For Each loop and lets you know there are non-numeric cells in the range.

As a programmer, you can perform different actions based on whether the entire range is numeric or not. Checks like this one give you more control over how you handle errors.

IsNumeric vs ISNUMBER

To test how the IsNumeric VBA and the ISNUMBER Excel functions behave, we’re going to make a User Defined Function (UDF) to evaluate the following cells in Column A:

We’ll use the native ISNUMBER function of Excel in Column C and we’ll use the the following UDF to represent our VBA IsNumeric function in Column B.

We’ll evalulate the expressions in Column A using both the VBA IsNumeric() function (Column B) and the Excel =ISNUMBER() function (Column C). You would expect them to be identical, right? You’re about to be surprised…

The two functions yield completely different answers when evaluating the same data. IT’S CRAZY!

By looking at the comparison image, you can see the VBA IsNumeric function considers empty cells numeric, but the Excel ISNUMBER function does not. That’s why I said earlier that it’s a good VBA practice to check if your cell is empty by using the IsEmpty function when you use the IsNumeric function.

Another difference you can see is in how the two functions treat dates and times. IsNumeric VBA says times are numbers, but dates are not. It also says the combination of dates and times are not numeric. ISNUMBER, on the other hand, says all 3 date/time cells are numeric.

Final Thoughts

Congratulations! You’re now an IsNumeric expert! You certainly know more about IsNumeric than the average Excel user, and for that you should be excited.

IsNumeric is a great VBA function, but, as you’ve seen, you have to be careful when using it if there’s a chance your input may be blank or if you’re evaluating dates and times.

It’s important to know what a function does well, but it’s equally important to know what a function doesn’t do well. I hope you find this VBA tutorial informative and you’re IsNumeric in your own macros!

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