string format in C#

Question

I have value ranging from 1 to 10000000. After value 10000 i need to show values as 1E6,1E7,1E8,.... How to set this in string.Format ?

Thanks to all for replying.
Now i am able to display 1E5,1E6,1E7,....by using format "0.E0" but i dont want to set "E" from 1 to 10000.
How to go about this ?

Answer 1

You could use the exponent notation but I think that it will work for all numbers and not only those greater than 10000. You might need to have a condition to handle this case.

Answer 2

Something like this should do the trick:

void Main()
{
  Console.WriteLine(NumberToString(9999));
  Console.WriteLine(NumberToString(10000));
  Console.WriteLine(NumberToString(99990));
  Console.WriteLine(NumberToString(100000));
  Console.WriteLine(NumberToString(10000000));
}

// Define other methods and classes here
static string NumberToString(int n)
{
  return (n > 10000) ? n.ToString("E") : n.ToString();
}

=>

9999
10000
9.999000E+004
1.000000E+005
1.000000E+007

nb: pick a better name for the function.