12/15/2023 0 Comments Learn vbaWhile If.Then.Else statements can evaluate a different expression for each ElseIf statement, the Select Case statement evaluates an expression only once, at the top of the control structure. Use the Select Case statement as an alternative to using ElseIf in If.Then.Else statements when comparing one expression to several different values. If.Then.Else statements can be nested to as many levels as you need. You can use the If.Then.Else statement to run a specific statement or a block of statements, depending on the value of a condition. You can't modify a constant or assign a new value to it as you can a variable. A constant is a meaningful name that takes the place of a number or string that does not change. You can make your code easier to read and maintain by using constants. Your code might contain frequently occurring constant values, or might depend on certain numbers that are difficult to remember and have no obvious meaning. Data types include those in the following table as well as user-defined types and specific types of objects. Using data types efficiently Data type summaryĪ data type is the characteristic of a variable that determines what kind of data it can hold. When a variable loses scope, it no longer has a value. The value of a variable may change over its lifetime, but it retains some value. The time during which a variable retains its value is known as its lifetime. Or it may be placed at the top of a module, in the Declarations section, When declaring variables, you usually use a Dim statement.Ī declaration statement can be placed within a procedure to create a procedure-level variable. Using parentheses in codeĪnd some methods don't return a value, so the arguments aren't enclosed in parentheses. When you call a Sub or Function procedure, you can supply arguments positionally, in the order that they appear in the procedure's definition, or you can supply the arguments by name without regard to position. Understanding named arguments and optional arguments The Call statement is not required, but if you use it, you must enclose any arguments in parentheses. Type the name of the procedure and include values for any required arguments. To call a Sub procedure from another procedure, A Function procedure is similar to a Sub procedure, but a function can also return a value. Writing a Function procedureĪ Function procedure is a series of Visual Basic statements enclosed by the Function and End Function statements. Writing a Sub procedureĪ Sub procedure is a series of Visual Basic statements enclosed by the Sub and End Sub statements that performs actions but doesn't return a value. Assignment statements always include an equal sign ( =). Writing assignment statementsĪssignment statements assign a value or expression to a variable or constant. You also define its scope, depending on where you place the declaration and what keywords you use to declare it. When you declare a procedure, variable, or constant, You use declaration statements to name and define procedures, variables,Īrrays, and constants. It can contain keywords, operators,Īnd expressions. Writing Visual Basic statementsĪ statement in Visual Basic is a complete instruction. The examples in this topic explain how to interpret the most common syntax elements. Or statement shows all the elements necessary to use the method, function, or statement correctly. The syntax in a Visual Basic Help topic for a method, This page in German, French, Spanish, Portuguese.It is assumed you have some practical acquaintance with programming in general. The paragraph below it gives summary information what can be found there. Each heading can be clicked to go the to page with that name. This page provides an organized entry to the MS VBA documentation. Understanding objects, methods, properties, and events.Understanding the lifetime of variables.Understanding named arguments and optional arguments.Otherwise, it would set the LBandwidth variable to the string value "High". This would set the LBandwidth variable to the string value "Low" if LWebsite was either "" or "" and LPages <= 10. You can use the OR function with the AND function in VBA, for example: If (LWebsite = "" Or LWebsite = "") And LPages <= 10 Then Otherwise, it would set the LResult variable to the string value "Fair". This would set the LResult variable to the string value "Great" if either LWebsite was "" or LCount > 25. This first example combines the OR function with the IF Statement in VBA: If LWebsite = "" Or LCount > 25 Then Let's look at some Excel OR function examples and explore how to use the OR function in Excel VBA code. The OR function with this syntax can only be used in VBA code in Microsoft Excel.
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