Try & catch in C#

Catch the exception you expect; let the rest travel.

var inputs = new[] { "10", "zero", "4" };

foreach (var text in inputs)
{
    try
    {
        var n = int.Parse(text);
        Console.WriteLine($"100 / {n} = {100 / n}");
    }
    catch (FormatException)
    {
        Console.WriteLine($"'{text}' is not a number");
    }
    finally
    {
        Console.WriteLine("checked one input");
    }
}

How it works

1. int.Parse throws on bad input; the typed catch names that failure.
2. finally runs on success and failure alike.
3. The loop survives the bad element and keeps processing.

Keywords and builtins used here

• catch
• finally
• foreach
• in
• int
• new
• try
• var

The run, in numbers

Lines

18

Characters to type

281

Tokens

66

Three-star pace

95 tpm

At the three-star pace of 95 tokens a minute, this run takes about 42 seconds.

Type this snippet

Step 1 of 3 in Errors & files, step 25 of 29 in Language basics.

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Try & catch in other languages

• Java