add commas using String.Format for number and

Question

Using String.Format how can i ensure all numbers have commas after every 3 digits eg 23000 = \"23,000\" and that 0 returns \"0\".

String.Format(\"{0:n}\", 0); //give

Answer 1

you just put it like this:

Console.WriteLine(**$**"Your current amount of money is: **{yourVar:c}**");

Answer 2

You can do this, which I find a bit cleaner to read the intent of:

String.Format("{0:#,###0}", 0);

Example:

string.Format("{0:#,###0}", 123456789); // 123,456,789
string.Format("{0:#,###0}", 0); // 0

Answer 3

You can put a number after the N to specify number of decimal digits:

String.Format("{0:n0}", 0) // gives 0

Answer 4

If your current culture seting uses commas as thousands separator, you can just format it as a number with zero decimals:

String.Format("{0:N0}", 0)

Or:

0.ToString("N0")

Answer 5

from msdn

double value = 1234567890;
Console.WriteLine(value.ToString("#,#", CultureInfo.InvariantCulture));

Displays 1,234,567,890

Answer 6

You can also play around a little with the CultureInfo object, if none of the other solutions work well for you:

        var x = CultureInfo.CurrentCulture;
        x.NumberFormat.NumberDecimalSeparator = ",";
        x.NumberFormat.NumberDecimalDigits = 0;
        x.NumberFormat.NumberGroupSizes = new int[] {3};