Excel FunctionsExcel Functions
Part 1. Introduction
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An Excel function is a formula or a procedure that isperformed in the Visual Basic environment, outside the Excelspreadsheet.
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For example, the sum of two variables can be evaluated in anExcel spreadsheet as follows:
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z
x + y
x =
5
y =
3
z =
8
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Sum of two variables in an Excel spreadsheet
This same sum can be done in the environment ofVisual Basic (VB)
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You can define a function called "Sum", which receives thevalue of two inputs "x" and "y" and returns the value ofthe sum of themYou can define a function called "Sum", which receives thevalue of two inputs "x" and "y" and returns the value ofthe sum of them
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How to build the function "Sum"How to build the function "Sum"
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- Enter in Excel and in the main menuclick in the Developer tab.- Enter in Excel and in the main menuclick in the Developer tab.
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If this tab is not available, see Note 1 "Activate tab" atthe end of the document.
Click on "view code"Click on "view code"
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The "Visual Basic" ambient is openThe "Visual Basic" ambient is open
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Function code
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Function code
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The codes are written in the VB "Modules"
Function code
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The codes are written in the VB "Modules"
To open a module
Function code
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The codes are written in the VB "Modules"
To open a module
Click right button on the left side window
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Function code
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The codes are writen in the VB "Modules"
To open a module
Click right button on the left side window
It opens a window
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Select “Insert”
Click Module
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The right window displays a flashing line
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Sum Function Code
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Sum Function Code
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In the right window type the function name followed bythe dependent variables in parentheses, separated by acomma.
Sum Function Code
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In the right window type the function name followed bythe dependent variables in parentheses, separated by acomma.
Function Suma(x,y)
Sum Function Code
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In the right window type the function name followed bythe dependent variables in parentheses, separated by acomma.
Function Suma(x,y)
When you press "Enter", VB automatically putsthe final line of the function.
Sum Function Code
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In the right window type the function name followed bythe dependent variables in parentheses, separated by acomma.
Function Suma(x,y)
End Function
The new code must be writen between these two commands.
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The new code must be writen between these two commands.
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In this case, the code consists of a single line
The new code must be writen between these two commands.
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In this case, the code consists of a single line
Suma = x + y
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The complete function looks like
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Application of the Sum function in the Excelspreadsheet
Type the values of x and y,
for example, in the cells
C5 and C6.
Type =SUM(C5,C&) in acell and press enter.
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Application of the Sum function in the Excelspreadsheet
The result valueappears in the cell
End of Part 1. Introduction
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Activating the "Programmer" tab
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Activating the “Developer" tab
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Note 1
To activate the “Developer” tab
1.Click Options.
2.Click Customize Ribbon.
3. Choose commands from: All Tabs.
4. Select the Developer check box.
5. Click on Add
6. Activate, by clicking on Developer
7. OK