Based on this logic, if x Mod 2 is not zero, it is an odd number; otherwise it is an even number.
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There are two kinds of loops in VB, the For Next loop and the Do In this chapter, we will discuss the For Next loop. The format of a For….. Next loop with a few examples. Example 5. When you click on the button , the VBA program will fill cells 1,1 with the value of 1, cells 2,1 with the value of 2, cells 3,1 with the value of The position of each cell in the Excel 33 spreadsheet is referenced with cells i,j , where i represents row and j represent column.
Figure 5. Next loop with single step increment Example 5.
Here, the value of i increases by 2 after each loop. Therefore, the VBA programs will fill up alternate cells after each loop.
When you click on the command button, cells 1, 1 will be filled with the value of 1, cells 2, 1 remains empty, cells 3, 1 filled with value of 3 and etc. Next loop with step increment 35 If you wish to exit the For ….
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Next loop after a condition is fulfilled, you can use the Exit For statement, as shown in Example 5. To be able to fill up a range of values across rows and columns, we can use the nested loops, or loops inside loops. This is illustrated in Example 5. In the process, it sums up the corresponding values of i and j. The program also differentiates the passes and failures with blue and red colors respectively. Next and the If Else statements to control the program flow.
We will discuss more about the Color property in a later chapter. The output is shown in Figure 5. Next loop to execute a repetitive process. In this chapter, you will learn about another looping method known as the Do Loop. It displays 10 in cells 1, 1 , 9 in cells 2, 1 ….. Examle 6. Select With Selection. End Select Normally it is sufficient to use the conditional statement If Else for multiple options or selections programs.
However, if there are too many different cases, the If Else structure could become too bulky and difficult to debug if problems arise. Fortunately, Visual Basic provides another way to handle complex multiple choice cases, that is, the Select Case End Select decision structure. The general format of a Select Case Case Else End Select In the following example, the program will process the grades of students according to the marks given.
Value 'To set the alignment to center Range "A1:B1".
Although Excel VBA is not a truly object oriented programming language, it does deal with objects. VBA object is something like a tool or a thing that has certain functions and properties, and can contain data. For example, an Excel Worksheet is an object, a cell in a worksheet is an object, a range of cells is an object, the font of a cell is an object, a command button is an object, and a text box is an object and more.
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In order to view the VBA objects, you can insert a number of objects or controls into the worksheet, and click the command button to go into the code window. The upper left pane of the code window contains the list of objects you have inserted into the worksheet; you can view them in the dropdown dialog when you click the down arrow.
The right pane represents the events associated with the objects. Figure 8. Properties are like the characteristics or attributes of an object. We connect an object to its property by a period a dot or full stop. The following example shows how we connect the property value to the Range object. Example 8. However, because value is the default property, it can be omitted. So the above procedure can be rewritten as Example 8. So an object can also be a property, it depends on the hierarchy of the objects. Range has higher hierarchy than cells, and interior has lower hierarchy than Cells, and color has lower hierarchy than Interior, so you can write 49 Range "A1:A3".
Cells 1, 1. Notice that although the Range object specifies a range from A1 to A3, but the cells property specifies only cells 1,1 to be filled with yellow color, it sort of overwrites the range specified by the Range object.
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Font is an object which belongs to the Range object. Font has its own properties. Sometime it is not necessary to type the properties, Excel VBA IntelliSense will display a drop-down list of proposed properties after you type a period at the end of the object name. You can then select the property you want by double clicking it or by highlighting it then press the Enter key.
The IntelliSense drop-down is shown in Figure 8. It shows the number of cells in the specified range. Count will return a value of In order to display the number of cells returned, you can write the following code. Methods normally do something or perform certain operations. For example, ClearContents is a method of the range object. It clears the contents of a cell or a range of cells.
You can write the following code to clear the contents: Example 8. ClearContents End Sub You can also let the user select his own range of cells and clear the contents by using the InputBox function, as shown in Example 8. ClearContents End Sub In order to clear the contents of the entire worksheet, you can use the following code: Sheet1.
ClearContents However, if you only want to clear the formats of an entire worksheet, you can use the following syntax: Sheet1. ClearFormats To select a range of cells, you can use the Select method. This method selects a range of cells specified by the Range object. Select Example 8. Select End Sub 52 Example 8. Select End Sub To deselect the selected range, we can use the Clear method. Clear Example 8.
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Another very useful method is the Autofill method. This method performs an autofill on the cells in the specified range with a series of items including numbers, days of week, months of year and more. The format is Expression. Destination means the required Range object of the cells to be filled.
The destination must include the source range. Type means type of series, such as days of week, months of year and more. When the user clicks on the command button, the program will first fill cell A1 with 1 and cell A2 will 2, and then automatically fills the Range A1 to A10 with a series of numbers from 1 to This can be achieved with the use of the InputBox.
Since each time we want to autofill a new range, we need to clear the contents of the entire worksheet using the Sheet1. ClearContents statement. In this chapter, we shall learn specifically about the Workbook object as it is one of the most important Excel VBA objects. It is also at the top of the hierarchy of the Excel VBA objects.
We will deal with properties and methods associated the Workbook object. The reason is that we are dealing with a collection of workbooks most of the time, so using Workbooks enables us to manipulate multiple workbooks at the same time.
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