Web Reference: Mar 9, 2026 · The try...catch statement is comprised of a try block and either a catch block, a finally block, or both. The code in the try block is executed first, and if it throws an exception, the code in the catch block will be executed. The try statement allows you to define a block of code to be tested for errors while it is being executed. The catch statement allows you to define a block of code to be executed, if an error occurs in the try block. Apr 8, 2025 · It works like this: First, the code in try {...} is executed. If there were no errors, then catch (err) is ignored: the execution reaches the end of try and goes on, skipping catch. If an error occurs, then the try execution is stopped, and control flows to the beginning of catch (err).
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