ASP If Else
VBScript branches code with If...Then...ElseIf...Else...End If, letting an ASP page choose which output to produce based on a condition.
The Basic If Statement
The simplest form tests a condition and runs a statement only when it's True. For a single statement, VBScript allows a compact one-line form: If condition Then statement, with no End If needed. For anything longer than one statement, use the block form, which must be closed with End If on its own line.
Example
<%
Dim age
age = 20
If age >= 18 Then Response.Write("You are an adult.")
%>Adding an Else Branch
Else supplies the code to run when the condition is False. Combined with the block form of If, this lets a page produce one of two possible outputs depending on a single test.
Example
<%
Dim age
age = 15
If age >= 18 Then
Response.Write("You may enter.")
Else
Response.Write("Sorry, you must be 18 or older.")
End If
%>Chaining Conditions with ElseIf
When there are more than two possible outcomes, ElseIf (written as one word) lets you test additional conditions in sequence without nesting a new If inside every Else. VBScript checks each condition from top to bottom and runs the first block whose condition is True, skipping the rest.
Example
<%
Dim score
score = 82
If score >= 90 Then
Response.Write("Grade: A")
ElseIf score >= 80 Then
Response.Write("Grade: B")
ElseIf score >= 70 Then
Response.Write("Grade: C")
Else
Response.Write("Grade: F")
End If
%>
