I have a double number:
element.MaxAllowableConcLimitPpm = 0.077724795640326971;
I need to display it as
7.7725e-2
when I try to use it:
element.MaxAllowableConcLimitPpm.ToString("e4", CultureInfo.InvariantCulture)
it returns
7.7725e-002
How to say that mantissa should have one symbol instead of 3 ?
Format like this:
.ToString("0.0000e0")
returns
5.0000e2
instead of
5.0000e+2
You have to use a custom numeric format string - standard numeric format strings always have at least three digits in the exponent.
Example with a custom string:
using System;
public class Test
{
static void Main()
{
double value = 0.077724795640326971;
Console.WriteLine(value.ToString("0.0000e+0")); // 7.7725e-2
}
}
From the documentation for standard numeric format strings (emphasis mine):
The case of the format specifier indicates whether to prefix the exponent with an "E" or an "e". The exponent always consists of a plus or minus sign and a minimum of three digits. The exponent is padded with zeros to meet this minimum, if required.
