C# uses try, catch, and finally blocks to help you handle exceptions (errors) safely.
🛠️ try Block
Put code that might fail here.
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try
{
int n = int.Parse("oops"); // Will throw an exception!
}
🛡️ catch Block
Handle the error.
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try
{
int n = int.Parse("oops");
}
catch (FormatException)
{
Console.WriteLine("Not a number!");
}
🔚 finally Block
Always runs whether or not there was an error. Useful for cleanup.
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try
{
// risky code
}
catch
{
// handle error
}
finally
{
Console.WriteLine("Done!");
}
💡 Try It!
Ask the user for a number, handle the error, and always print “Goodbye!”
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try
{
Console.Write("Enter a number: ");
int n = int.Parse(Console.ReadLine());
Console.WriteLine($"You entered {n}");
}
catch
{
Console.WriteLine("That was not a valid number.");
}
finally
{
Console.WriteLine("Goodbye!");
}
Next: Throwing your own exceptions!
