Lokang 

JavaScript and MySQL

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try-catch statements and their syntax

A try-catch statement is a JavaScript feature that allows you to handle errors gracefully in your code. The basic syntax of a try-catch statement is as follows:

try {
 // Code that might throw an error
} catch (error) {
 // Code that handles the error
}

Here's how it works:

  1. The code inside the try block is executed.
  2. If an error occurs while executing the try block, JavaScript immediately jumps to the catch block.
  3. The catch block takes an error parameter, which contains information about the error that was thrown. You can use this information to handle the error in an appropriate way (e.g., logging an error message, displaying an error to the user, etc.).
  4. After the catch block is executed, the program continues with the code that comes after the try-catch statement.

Here's an example of a try-catch statement:

try {
 let x;
 console.log(x.toUpperCase()); // This line will throw a runtime error
} catch (error) {
 console.log("An error occurred: " + error.message);
}

In this example, the try block contains code that tries to call the toUpperCase() method on an undefined variable. This will throw a runtime error, but the catch block will catch the error and log a message to the console, preventing the program from crashing.



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