1.1.6 Error handling

• Error handling in programming is the process of anticipating, detecting, and resolving errors
• What are four key reasons to implement error handling in programming?

  Prevent crashes, feedback, data integrity, reliability
• Steps in the provided pseudocode for error handling in calculating area

  1️⃣ Check if length or width is non-positive

  2️⃣ Display error message if condition is true

  3️⃣ Return 0 if condition is true

  4️⃣ Calculate area if condition is false

  5️⃣ Return calculated area
• Match the error handling technique with its description:

  Exception Handling ↔️ Using try-catch blocks for runtime errors

  Error Codes ↔️ Returning specific codes for error types

  Assertions ↔️ Verifying conditions and stopping if false
• What is an advantage of exception handling in error handling?

  Separates error handling code
• Error codes are simple to implement but require extensive checks
• Assertions can degrade performance if overused in a program.
• Steps in the provided pseudocode for error handling in calculating area

  1️⃣ Check if length or width is non-positive

  2️⃣ Display error message if condition is true

  3️⃣ Return 0 if condition is true

  4️⃣ Calculate area if condition is false

  5️⃣ Return calculated area
• What is the primary purpose of exception handling in error handling?

  Handle runtime errors
• Error codes involve returning specific codes to indicate different error types
• Assertions help identify bugs early in the development process.
• What are four key reasons to implement error handling in programming?

  Prevent crashes, feedback, data integrity, reliability
• Match the error handling technique with its description:

  Exception Handling ↔️ Using try-catch blocks for runtime errors

  Error Codes ↔️ Returning specific codes for error types

  Assertions ↔️ Verifying conditions and stopping if false
• Exception handling uses try-catch blocks to handle runtime errors.
• Error codes are simple to implement but require extensive checks.
• What is a disadvantage of using assertions for error handling?

  Can degrade performance
• Errors in programming can be categorized into syntax, runtime, and logical errors.
• Syntax errors occur when the code violates the programming language's syntax rules.
• What type of error occurs when the code compiles successfully but fails during execution?

  Runtime error
• Order the error types based on their description:

  1️⃣ Syntax Errors: Violations of the language's syntax

  2️⃣ Runtime Errors: Occur during program execution

  3️⃣ Logical Errors: Flaws in the program's logic
• Match the error type with its cause:

  Syntax Errors ↔️ Misspelled keywords

  Runtime Errors ↔️ Division by zero

  Logical Errors ↔️ Incorrect calculations
• Exception handling uses try - catch</latex> blocks to handle runtime errors.
• What does the $catch$ block do in exception handling?


  Handles thrown errors
• Error codes use a negative value, such as -1, to indicate an invalid quantity.
• Steps in the provided pseudocode for assertions:

  1️⃣ Validate if age is non-negative

  2️⃣ Assert condition, display error message if false

  3️⃣ Return age if condition is true
• What are four key reasons to implement error handling in programming?

  Prevent crashes, feedback, data integrity, reliability
• Error handling techniques can be compared based on their description, advantages, and disadvantages.
• What are the three types of errors in programming?

  Syntax, runtime, logical
• A missing semicolon in C++ is an example of a syntax error.
• An index out of range in Python is a runtime error.
• What type of error occurs when the code violates the syntax rules of the programming language?

  Syntax Error
• Runtime errors occur during program execution
• Logical errors result from flawed logic or algorithms in the code.
• In the C++ example of a logical error, what is incorrect in the `calculateAverage` function?

  Incorrect calculation
• In the Python example of a logical error, the incorrect calculation in the `calculate_average` function is return total / len(numbers) + 1
• Syntax highlighting in IDEs can help prevent syntax errors.
• What is the primary method to prevent logical errors in programming?

  Structured programming
• Exception handling uses try - catch
• What is an advantage of using error codes in error handling?

  Simple to implement
• Assertions can degrade performance if overused.