VBA Conditional Statements
The main Excel VBA Conditional Statements are the If ... Then statement and the Select Case statement. Both of these evaluate one or more conditions and, depending on the result, execute specific actions.
The two Conditional Statement types are discussed individually below.
The Visual Basic If ... Then Statement
The If ... Then statement tests a condition and if it evaluates to true, carries out a set of actions. Alternative actions can be specified if the condition evaluates to false.
The format of the If ... Then statement is:
The main Excel VBA Conditional Statements are the If ... Then statement and the Select Case statement. Both of these evaluate one or more conditions and, depending on the result, execute specific actions.
The two Conditional Statement types are discussed individually below.
The Visual Basic If ... Then Statement
The If ... Then statement tests a condition and if it evaluates to true, carries out a set of actions. Alternative actions can be specified if the condition evaluates to false.
The format of the If ... Then statement is:
If Condition1 Then Actions if Condition1 evaluates to True ElseIf Condition2 Then Actions if Condition2 evaluates to True Else Actions if none of the previous conditions evaluate to True End If |
In the above if statement, the ElseIf and the Else parts of the conditional statement can be left out if desired.
The example below shows the If ... Then statement being used to color the current active cell, depending on the value of the cell contents.
If ActiveCell.Value < 5 Then ActiveCell.Interior.Color = 65280 ' Color cell interior green ElseIf ActiveCell.Value < 10 Then ActiveCell.Interior.Color = 49407 ' Color cell interior orange Else ActiveCell.Interior.Color = 255 ' Color cell interior red End If |
The Visual Basic Select Case Statement
The Select Case statement is similar to the If ... Then statement, in that it tests an expression, and carries out different actions, depending on the value of the expression.
The format of the Select Case statement is:
Select Case Expression Case Value1 Actions if Expression matches Value1 Case Value2 or Expresson2 Actions if Expression matches Value2 . . . Case Else Actions if expression does not match any of listed cases End Select |
In the above code block, the Case Else part of the conditional statement is optional.
The example below shows the Select Case statement being used to color the current active cell, depending on the value of the cell contents.
Select Case ActiveCell.Value Case Is <= 5 ActiveCell.Interior.Color = 65280 ' Color cell interior green Case 6, 7, 8, 9 ActiveCell.Interior.Color = 49407 ' Color cell interior orange Case 10 ActiveCell.Interior.Color = 65535 ' Color cell interior yellow Case Else ActiveCell.Interior.Color = 255 ' Color cell interior red End Select |
The above example illustrates different ways of defining the different Cases in the Select Case statement. These are:
Case Is <= 5 | This is an example of how you can test if your expression satisfies a condition such as <= 5 by using the keyword Case Is |
Case 6, 7, 8, 9 | This is an example of how you can test if your expression evaluates to any one of several values, by separating the possible values by commas |
Case 10 | This is an example of the basic test of whether your expression evaluates to a specific value |
Case Else | This is an example of the 'Else' condition, which is executed if your expression hasn't matched any of the previous cases |
Note that as soon as one case in the Select Case statement is matched, and the corresponding actions executed, the wholeSelect Case statement is exited. Therefore, you will never get entry into more than one of the listed cases.
Comments
Post a Comment
jeetexceltips@gmail.com