Error Handling

1What is Error Handling?✨

Error handling is a way to manage mistakes that happen while your program is running. It helps you catch errors before they crash your code and allows your program to continue running smoothly.

2Why Learn Error Handling?🎯

• ✓ Prevents program crashes
• ✓ Improves user experience
• ✓ Makes debugging easier
• ✓ Helps you write robust, reliable code

3Try-Catch Statement💡

The try-catch statement is used to handle errors in JavaScript. You wrap your code in a try block, and if an error occurs, the catch block runs instead of crashing the program.

4Example:🚀

try {
    let result = riskyFunction();
    console.log(result);
} catch (error) {
    console.error("An error occurred: " + error.message);
}

5Common Error Types🔍

• JavaScript has several common error types, such as:
• SyntaxError: Mistakes in the syntax
• TypeError: Using a value of the wrong type
• ReferenceError: Trying to use a variable that doesn't exist

6Example:⭐

try {
    console.log(nonExistentVariable);
} catch (error) {
    console.error("Caught a ReferenceError: " + error.message);
}

7Finally Block🧩

The finally block is used to run code after try and catch, regardless of whether an error occurred. This is useful for cleanup tasks.

8Example:🎈

try {
    let data = fetchData();
} catch (error) {
    console.error("Failed to fetch data: " + error.message);
} finally {
    console.log("Cleanup code runs here.");
}

9What You'll Build This Grade✨

• ✓ Programs that handle user inputs gracefully
• ✓ Games that manage unexpected events
• ✓ Applications that log errors for developers
• ✓ Tools that provide feedback to users when something goes wrong