Using Conditional Statements

Problem

You need to make some logical tests and branch your code accordingly.

Solution

Use If/Then statements as illustrated in Example 2-11.

Example 2-11. If statements

If (time = 32000) then
 ' Statements go here
End If

If (MyCondition = True) Then
 ' Statements
Else
 ' More statements
End If

If (count < 10) Then
 ' Statements
ElseIf (count < 20) Then
 ' Statements
ElseIf (count < 30) Then
 ' Statements
End If

If statements start with the If keyword followed by a logical expression, which is followed by the Then keyword. If the logical expression is true, the code between the If statement and the End If statement gets executed. You can also use the Else keyword to define a block of code to execute if the logical expression is false. Further, you can use the ElseIf keyword to test other conditions in a series of If-Then-ElseIf-Then statements.

You'll notice I enclose the logical expressions being evaluated in parentheses. VBA does not require this; I do so only because it is more readable to me. (It's also kind of a habit I picked up from programming in C.)

See Also

Sometimes you may encounter situations where you have a lot of conditions to test and you find yourself with long, strung out If-Then-ElseIf-ElseIf-Then statements. In these situations, you may find VBA's Select Case statement more appropriate. Select Case statements are handy when you're testing for different values of a numerical expression or text. See the VBA help topic "Select Case Statement" for more information.

Using Excel

Getting Acquainted with Visual Basic for Applications

Collecting and Cleaning Up Data

Charting

Statistical Analysis

Time Series Analysis

Mathematical Functions

Curve Fitting and Regression

Solving Equations

Numerical Integration and Differentiation

Solving Ordinary Differential Equations

Solving Partial Differential Equations

Performing Optimization Analyses in Excel

Introduction to Financial Calculations

Index

show all menu



Excel Scientific and Engineering Cookbook
Excel Scientific and Engineering Cookbook (Cookbooks (OReilly))
ISBN: 0596008791
EAN: 2147483647
Year: N/A
Pages: 206
Authors: David M Bourg
Similar book on Amazon

Flylib.com © 2008-2017.
If you may any questions please contact us: flylib@qtcs.net