Programming

1. Explain the term Exception
2. Explain how to throw an exception and how to handle an exception
3. Show how an exception can be implemented in your program
4. Show how you can test your code in your Program.cs ← Example Answer Not Included ❗

Question 1

An exception in C# is an error that occurs during program execution when something unexpected happens, like trying to divide by zero or accessing a null reference.

Exceptions are used to handle and manage errors gracefully through try-catch blocks, allowing programs to respond to errors without crashing.

Question 2

To throw an exception in C#, you use the throw keyword followed by a new instance of an exception class. Here are some examples:

// Kast en standard exception
throw new Exception("Dette er en fejlbesked");

// Kast en specifik exception type
throw new ArgumentNullException("parameterNavn", "Parameter må ikke være null");

// Kast en custom exception
throw new MinCustomException("Min egen fejlbesked");

Question 3

You can throw exceptions inside a method when certain conditions are met

public void DividerTal(int tal1, int tal2)
{
    if (tal2 == 0)
    {
        throw new DivideByZeroException("Man kan ikke dividere med nul!");
    }
    
    int resultat = tal1 / tal2;
}

System Development

1. Explain the concept of User Story.