String Format Numbers Thousands 123K, Millions 123M, Billions 123B

Question

Is there a way using a string formatter to format Thousands, Millions, Billions to 123K, 123M, 123B without having to change code to divide value by Thousand, Million or Bi

Answer 1

There are different ways to achieve this, but for me the easiest and quickest is to use the "," custom specifier

double value = 1234567890;

// Displays 1,234,567,890   
Console.WriteLine(value.ToString("#,#", CultureInfo.InvariantCulture));

// Displays 1,234,568K
Console.WriteLine(value.ToString("#,##0,K", CultureInfo.InvariantCulture));

// Displays 1,235M
Console.WriteLine(value.ToString("#,##0,,M", CultureInfo.InvariantCulture));

// Displays 1B
Console.WriteLine(value.ToString("#,##0,,,B", CultureInfo.InvariantCulture));

Answer 2

You can implement a ICustomFormatter that divides the value by thousand, million or billion, and use it like this:

var result = string.Format(new MyCustomFormatter(), "{0:MyFormat}", number);

Answer 3

I use this mix of formats in an Extension Method (just add it to your project and enjoy)