Thethrowstatementthrows(generates) an error. The technical term for this is: Thethrowstatementthrows an exception. The exception can be a JavaScript String, a Number, a Boolean or an Object: throw"Too big";// throw a text throw500;// throw a number ...
In the above program, thethrowstatement is used within thetryblock to catch an exception. And thethrowstatement is rethrown in thecatchblock which gets executed if thecatchblock cannot handle the exception. Here, thecatchblock handles the exception and no error occurs. Hence, thethrowstatement is...
But keep in mind that you need to use thethrowstatement in combination withtry..catchstatement, because without thetry..catchstatement, the exception you throw will not be caught by your code. The exception will be propagated up until it eventually gets caught by the default error reporting sy...
The throw statement creates a user define exception. You can create your own exception for unexpected events and control the script properly to throw the exception in a try block and handle it in the catch block. Syntaxthrow exception;
When a JavaScript statement generates an error, it is said tothrowanexception.(在js中,程序产生错误,叫做抛出异常) Instead of proceeding to the next statement, the JavaScript interpreter checks for exception handling code. If there is no exception handler, then the program returns from whatever func...
Statement throw Yes Yes Yes Yes Yes语法throw expression;参数值参数描述 expression 必需的。要抛出的异常。可以是字符串、数字、布尔值或对象。技术细节JavaScript 版本: ECMAScript 3相关页面JavaScript 教程: JavaScript 错误 JavaScript 参考手册: JavaScript try/catch/finally 语句...
JS1019: Can't have 'break' outside of loop JS1020: Can't have 'continue' outside of loop JS1023: Expected hexadecimal digit JS1024: Expected 'while' JS1025: Label redefined JS1026: Label not found JS1027: 'default' can only appear once in a 'switch' statement JS1028: Expected i...
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process_untagged p.attrs in let objs = @@ -1184,8 +1204,8 @@ and statement_desc top cxt f (s : J.statement_desc) : cxt = let e = match e.expression_desc with | Caml_block (el, _, _, ((Blk_extension | Blk_record_ext _) as ext)) -> { e with expression_desc = exn...
Hence, you cannot throw it using athrowstatement. To throw an out of range exception in C++, you must create an out of range exception by passing a string as an input argument to thestd::out_of_range()constructor; only then will you be able to throw the out of range exception successf...