Description. The Microsoft Excel CLNG function converts a value to a long integer. The CLNG function is a built-in function in Excel that is categorized as a Data Type Conversion Function. It can be used as a VBA function (VBA) in Excel.
VBA Converting Data Types
- Check if String is Numeric, IsNumeric()
- Convert String to Integer, CInt()
- Convert String to Double, CDbl()
- Convert String to Long, CLng()
- Convert String to Single, CSng()
- Convert String to Decimal, CDec()
CStr converts literals into Strings. It handles Integer, Boolean and Char. It changes these into their String representations. In VB.NET we cannot call the ToString function on these types.
A VBA Type Mismatch Error occurs when you try to assign a value between two different variable types. The error appears as “run-time error 13 – Type mismatch”. For example, if you try to place text in a Long integer variable or you try to place text in a Date variable.
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.
IsNumeric is the VBA function which checks if a value is numeric and returns a Boolean TRUE or FALSE as a result. 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.
The CSNG function returns a single-precision numeric value.
There is no different between using Dim or Private on a module/class level variable, because they mean the same thing. Inside an actual code block or method, you can't use the private keyword.
A double data type is one of the data types that allows for decimals, as opposed to the integer data type. It's not necessary to always declare the data type. Sometimes, it's sufficient to declare the name, and VBA can infer the data type when the variable is used in the code later on.
You don't need to declare variables to make the VBA code work.
Setting variablesIn VBA, declaring variables is optional, but you can't declare AND set the variable at the same time. We've added a line that assigns the value of a variable. In VBA, just append “. Value”, an equals sign, and the value you want to assign (in quotation marks).
The Dim keyword is short for Dimension. It is used to declare variables in VBA. Declare means we are telling VBA about a variable we will use later.
Accessing Global Variables in VBA (Excel)
- Option Explicit Public NumNodes As Integer Sub Inst_Glob_Vars() NumNodes = 0 End Sub.
- Option Explicit Private Sub Workbook_Open() Call Inst_Glob_Vars End Sub.
- Private Sub CommandButton2_Click() 'NumNodes = NumNodes + 1 Debug.Print "NumNodes = " & NumNodes 'Debug End Sub.
Variables are specific values that are stored in a computer memory or storage system. Later, you can use that value in code and execute. The computer will fetch that value from the system and show in the output. Each of the Excel VBA variable types must be given a name.
VBA Data Types: Long. Introduction. A long integer is a number that can be used for a variable involving greater numbers than integers. To declare a variable that would hold such a large number, use the Long data type.
Byte, Integer & Long
| Type | Storage | Range of Values |
|---|
| Byte | 1 byte | 0 to 254 |
| Integer | 2 bytes | -32,768 to 32,767 |
| Long | 4 bytes | -2,147,483,648 to 2,147,483,647 |
Automatically Run Excel Macros When a Cell ChangesIn Excel a Worksheet Change Event is a trigger for a macro when a cell or group of cells change. Normally Excel keeps a record of a number of actions. The VBA code to perform this action needs to go in the sheet object you want to perform the event.
Convert number to text using the Excel TEXT function
- Add a helper column next to the column with the numbers to format.
- Enter the formula =TEXT(C2,"0") to the cell D2.
- Copy the formula across the column using the fill handle.
- You will see the alignment change to left in the helper column after applying the formula.
Identifier type characters
| Identifier type character | Data type | Example |
|---|
| % | Integer | Dim L% |
| & | Long | Dim M& |
| @ | Decimal | Const W@ = 37.5 |
| ! | Single | Dim Q! |
In VBA, you concatenate strings into a single string using the & , or ampersand, operator. “Concatenate” is just a fancy way of saying “combine” or “join.” This isn't just a VBA thing. The word “concatenate” is used in almost all programming languages.
The worksheet LEN function returns the number of characters in a text string. Use this function to get the length of a text string. Syntax: LEN(text_string). It is necessary to mention the text_string argument which is the text string whose length you want to get in number of characters.
Concatenation is to combine the strings of two or more multiple strings of different cells. To perform this in Excel, we have inbuilt worksheet function that is CONCAT. Worksheet function concat is not accessible in VBA to concatenate. Concatenation will be achieved with the help of operator ampersand (&) and plus (+).
Typecasting, or type conversion, is a method of changing an entity from one data type to another. An example of typecasting is converting an integer to a string. This might be done in order to compare two numbers, when one number is saved as a string and the other is an integer.
Integer: An integer is a beta version of the byte data type, and it can hold values ranging from -32768 to 32768. Any values that exceed this range will return an error.
By default, Excel uses the A1 reference style, which refers to columns as letters (A through IV, for a total of 256 columns), and refers to rows as numbers (1 through 65,536). These letters and numbers are called row and column headings. To refer to a cell, type the column letter followed by the row number.
A string is a data type used in programming, such as an integer and floating point unit, but is used to represent text rather than numbers. For example, the word "hamburger" and the phrase "I ate 3 hamburgers" are both strings. Even "12345" could be considered a string, if specified correctly.
Table of All The VBA Data Types
| Data Type | Stored | Range of Values |
|---|
| Byte | 1 Byte | 0 to 255 |
| Integer | 2 Bytes | -32,768 to 32,767 |
| Single | 4 Bytes | -3.402823E38 to -1.401298E-45 for negative values, 1.401298E-45 to 3.402823E38 for positive values |
| Long | 4 Bytes | -2,147,483,648 to 2,147,483,648 |
A space followed by an underscore tells VBA that the current statement isn't finished yet but continues on the next line – it's used to split a single line of code over two lines, in order to make the code more readable (because VBA doesn't word-wrap).
To get a cell's value with VBA, follow these steps:
- Identify and return a Range object representing the cell whose value you want to get (Cell).
- Get the cell's value with the Range. Value or Range. Value2 property (ValueOrValue2).
- Assign the value returned by Range. Value or Range. Value to a variable (myVariable =).
