Hold integer inputs into an array

Question

I am trying to hold integer inputs into an array but it doesn't work. I found an example for string hold from How to Fill an array from user input C#?

string[] yazi = new string[15];
for (int i = 0; i < yazi.Length; i++)
{
      yazi[i] = Console.ReadLine();
}

But when I turn this code to integer, it gave an error

int[] sayis = new int[20];
for (int k = 0; k < sayis.Length; k++)
{
      sayis[k] = int.Parse(Console.ReadLine());
}

Am I missing something?

Works fine for me as long as I enter integers. What error do you get? — Dennis Traub
– Dennis Traub, Commented Mar 31, 2012 at 10:10

Jon Skeet · Accepted Answer · 2012-03-31 10:14:55Z

6

Am I miss something?

The error message, for one thing...

It should be fine - so long as you type integers into the console. (I've just tried it, and it worked perfectly.) If the user enters a value which can't be parsed as an integer, you'll get a FormatException. You should consider using int.TryParse instead... that will set the value in an out parameter, and return whether or not it actually succeeded. For example:

for (int k = 0; k < sayis.Length; k++)
{
    string line = Console.ReadLine();
    if (!int.TryParse(line, out sayis[k]))
    {
        Console.WriteLine("Couldn't parse {0} - please enter integers", line);
        k--; // Go round again for this index
    }
}

edited Mar 31, 2012 at 10:14

answered Mar 31, 2012 at 10:08

Jon Skeet

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2 Comments

Merve Gül Over a year ago

But I got the error, which I didnt give any input to the console. I mean, I get error when the console run. I will try int.TryParse

Jon Skeet Over a year ago

@Merve: Right. That will happen if you don't type in a number (including if you press return without entering anything).

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