c# - 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 Billion?

String.Format("{0:????}", LargeNumber)

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));