VB .NET Language in a Nutshell

Name

If...Then...Else Statement

Syntax

Ifcondition Then
    [statements]
[ElseIf condition-n Then
    [elseifstatements] ...
[Else
    [elsestatements]]
End If

Or, you can use the single line syntax:

Ifcondition Then [statements] [Else elsestatements]

condition

Use: Required

Data Type: Boolean

An expression returning either True or False or an object type

statements

Use: Optional

Program code to be executed if condition is true

condition-n

Use: Optional

Same as condition

elseifstatements

Use: Optional

Program code to be executed if the corresponding condition-n is True

elsestatements

Use: Optional

Program code to be executed if the corresponding condition or condition-n is False

Description

Executes a statement or block of statements based on the Boolean (True or False) value of an expression

Rules at a Glance

• If condition is True, the statements following the If are executed.

• If condition is False and no Else or ElseIf statement is present, execution continues with the corresponding End If statement. If condition is False and ElseIf statements are present, the condition of the next ElseIf is tested. If condition is False and an Else is present, the statements following the Else are executed.

• In the block form, each If statement must have a corresponding End If statement. ElseIf statements do not have their own End If. For example:

  Ifcondition Then
     statements
  ElseIf condition Then
     statements
  End If

• ElseIf and Else are optional, and any number of ElseIf and Else statements can appear in the block form. ...