@isnull() Function |
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@isnull() function is used to check if the given symbol exists. If the symbol exists true is returned even though its value is blank. Syntax: @isnull(symbol) symbol This function is the opposite of the exists() function
Examples: @doif( isnull(i:NAME) ) .. @doend()
@set(s:/si/SSTR, isnull(i:SSTR) ? \rl : i:SSTR) @// Assignment is done only if there is a request parameter with name SSTR, otherwise the whole line removed.
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