Daily tasks .- Handling Errors in JavaScript with try...catch

 JavaScript is a powerful programming language used by web developers to create dynamic and interactive web pages. However, like any programming language, JavaScript can encounter errors during runtime that can crash our program. Luckily, JavaScript provides us with the try...catch statement to handle these errors gracefully and prevent our program from crashing.

try { // Code that may throw an error } catch (error) { // Code to handle the error }

The try...catch statement is used to catch errors that occur during the execution of a program. The basic syntax of a try...catch statement is as follows:

In this example, the try block contains the code that may throw an error. If an error occurs during the execution of this block, JavaScript will immediately jump to the catch block. The catch block contains code to handle the error.

Let's take a look at a practical example of how to use try...catch in JavaScript:

function divide(a, b) { try { if (b === 0) { throw new Error("Cannot divide by zero"); } return a / b; } catch (error) { console.error(error.message); } } console.log(divide(10, 0)); // "Cannot divide by zero" console.log(divide(10, 2)); // 5 

5

In this example, we've defined a divide function that attempts to divide a by b. Before performing the division, we've wrapped the code that may throw an error in a try block. If an error is thrown, the program immediately jumps to the catch block, where we log the error message to the console using console.error().

We've called the divide function twice, once with b set to zero and once with b set to 2. The first call will throw an error, and the error message "Cannot divide by zero" will be logged to the console. The second call will return the result of the division, which is 5.

In conclusion, the try...catch statement is an important part of error handling in JavaScript. It allows us to gracefully handle errors and prevent our program from crashing. By using try...catch, we can write more robust and reliable JavaScript code.