How to format the number when it has atleast thousand unit

Question

Using the below code I am formatting the double number with group seperator like if the number is 5000, it should display like 5,000 and if the number is only 5 it should display only 5 but here its displaying 05 how can I avoid this?

double doubleNumTest = 5;
string str = doubleNumTest.ToString("0,0", CultureInfo.InvariantCulture);

Answer 1

You can use the numeric format specifier with zero fractional digits; N0:

string str = doubleNumTest.ToString("N0", CultureInfo.InvariantCulture);

Answer 2

Try this:

string str = doubleNumTest.ToString("#,0", CultureInfo.InvariantCulture);

Answer 3

The format string that you are using is telling it to print the leading zero's, try using the # instead of the 0.

from MSDN

"0" Zero placeholder Replaces the zero with the corresponding digit if one is present; otherwise, zero appears in the result string.

"#" Digit placeholder Replaces the "#" symbol with the corresponding digit if one is present; otherwise, no digit appears in the result string.

Answer 4

Use Digit placeholder:

Replaces the "#" symbol with the corresponding digit if one is present; otherwise, no digit appears in the result string.

More information: The "#" Custom Specifier.

double doubleNumTest = 5;
string str = doubleNumTest.ToString("#,#", CultureInfo.InvariantCulture);

double doubleNumTest = 500;
string str = doubleNumTest.ToString("#,#", CultureInfo.InvariantCulture);

double doubleNumTest = 50000;
string str = doubleNumTest.ToString("#,#", CultureInfo.InvariantCulture);

Output:

5
500
50,000

See here for the custom numeric formats that can be passed to this method.