A keyword, in the context of search engine optimization, is a particular word or phrase that describes the contents of a Web page. Keywords are intended to act as shortcuts that sum up an entire page. Keywords form part of a Web page’s metadata and help search engines match a page to with an appropriate search query.
Try defines a block of statements that may throw an exception. When a specific type of exception occurs, a catch block catches the exception. If an exception is not handled by try/catch blocks, the exception escalates through the call stack until the exception is caught or an error message is printed by the compiler. A try/catch block also may be nested with one or more try/catch statements. Each try statement has a matching catch statement to handle the exception. If an exception's inner try statement does not have a matching catch statement, subsequent try statement catch handlers are checked. This process continues until all inner try statements are checked for a matching catch statement. If a catch statement does not match, the runtime system handles the exception.Try/catch block examples include:
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