Checking if user input is an integer in c# [duplicate]

Question

So I'm making a little text game, and I need the user to enter an integer when it asks for grid size. And if an integer isn't entered I want the question to be asked again.

Right now I have:

Console.WriteLine("Enter Grid Size.");
int gridSize = int.Parse(Console.ReadLine());

I need a way to check if the input is a integer, and then ask again if it's not. Thanks

check out msdn.microsoft.com/en-us/library/f02979c7%28v=vs.110%29.aspx — lloyd christmas
– lloyd christmas, Commented Apr 14, 2015 at 23:07

Reed Copsey · Accepted Answer · 2015-04-14 23:08:52Z

7

You can use int.TryParse instead:

int gridSize;
Console.WriteLine("Enter Grid Size.");
while(!int.TryParse(Console.ReadLine(), out gridSize))
{
    Console.WriteLine("That was invalid. Enter a valid Grid Size.");
}

// use gridSize here

answered Apr 14, 2015 at 23:08

Reed Copsey

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Comments

Peyman · Accepted Answer · 2015-04-14 23:08:12Z

4

You can use TryParse:

var input = 0;
if(int.TryParse(Console.ReadLine(), out input)
{
}

answered Apr 14, 2015 at 23:08

Peyman

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