Exception Handling in Dart | Lecture 10 | try catch finally throw | Flutter & Dart Full Course
📌 Flutter & Dart Full Course | Lecture 10
Exception Handling in Dart | try catch finally throw
Welcome to Lecture 10 of our Flutter & Dart Full Course!
In this lecture, we will learn Exception Handling in Dart and understand how to prevent applications from crashing when errors occur.
Exception Handling is one of the most important concepts in real-world software development because applications must handle unexpected situations gracefully.
What You'll Learn in This Lecture
✅ What are Exceptions in Dart
✅ Using try Blocks
✅ Handling Errors with catch
✅ Using finally for Cleanup Code
✅ Creating Exceptions using throw
✅ Custom Exception Classes
✅ Using on for Specific Exceptions
✅ Real-world Error Handling Examples
Practice Task
Create a division function that:
✔ Accepts two numbers
✔ Uses try/catch
✔ Handles division by zero
✔ Prints a user-friendly error message
💻 Post your solution in the comments.
📚 Resources & Links
📌 Previous Lecture
Strings & Null Safety in Dart | Lecture 9
• Strings & Null Safety in Dart | Lecture 9 ...
📌 Full Course Playlist
• Dart Masterclass | Build Real Apps
📌 Flutter Roadmap
• Flutter Zero to Hero Roadmap | 11 Phases |...
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0:15 What is Exception Handling and why is it important for developers?
1:25 Understanding the keywords: try, catch, finally, and throw.
1:52 When does the 'finally' block execute in a Dart program?
2:54 Solving the "Division by Zero" problem in Dart.
4:34 How to handle API response and JSON mismatch errors using try-catch?
6:13 Practical Example: Throwing an error for negative age values.
7:10 How to create and implement a custom Exception class?
9:40 Demonstration of "Integer Division by Zero" exception in VS Code.
11:15 How to wrap risky code with try-catch to prevent app crashes?
13:52 Explaining how the 'finally' block works regardless of errors.
17:03 Using the 'throw' keyword to trigger custom exception messages.
18:34 How to catch specific custom exceptions using the 'on' keyword?
21:46 Practice Task: Mastering Exception Handling for beginners.
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💬 Comment "Done!" once you complete the practice task
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