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The Big If The simplest of constructs, found in every language, is the If-Then-Else statement. I think it's familiar to everyone, so let's start with an example. <% If OK = True Then Response.Write "OK" Else Response.Write "Error" End If %> Some important points to note: 15 " The condition after the If must be followed by the Then keyword. This is unlike C, C++ or Java which do not require the Then keyword to follow. " If only a single statement is to be executed in the Then block, it may directly follow the Then on the same line. If there are multiple statements to execute in the Then-block, the first statement should begin on the line after Then. " The Else-block, as in most languages, is optional. " The complete set of statements in the Then-block as well as the Elseblock need to be "closed" by the End If keyword. This is very important, and the source of many hard-to-locate errors! Take care not to forget it! The following are further examples of valid as well as invalid If-constructs: <% If OK = True Then Response.Write "OK" Else Response.Write "Error" %> This is valid. Since only one statement is to be executed in each of the Then- & Else-blocks, we do not require an End If. In addition, the Else statement must be on the same line. <% If OK = True Then Response.Write "OK" Else Response.Write "Error" %> This is invalid. Since only one statement belongs to the Then-block, the first part of the construct above is fine. However, the Else cannot continue on the next line in such a case. A simple rule of thumb to follow, is to use only one form of the If-statement for all your needs: <% If OK = True Then Response.Write "OK" ' ... Any more statements Else Response.Write "Error" ' ... Any more statements End If %> Incidentally, any line that begins with an apostrophe, ', is a comment; it is ignored by the interpreter. The following line is partly executable and partly a comment. <% OK = True 'Sets OK to True ACTIVE SERVER PAGES 3.0 16 %> The comment begins after the apostrophe.

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