How to Format Decimals in a Currency Format

How can I format decimal property to currency?

Properties can return anything they want to, but it's going to need to return the correct type.

private decimal _amount;

public string FormattedAmount
{
    get { return string.Format("{0:C}", _amount); }
}

Question was asked... what if it was a nullable decimal.

private decimal? _amount;

public string FormattedAmount
{
    get
    {
         return _amount == null ? "null" : string.Format("{0:C}", _amount.Value);
    }
}  

How to format decimals in a currency format?

I doubt it. The problem is that 100 is never 100 if it's a float, it's normally 99.9999999999 or 100.0000001 or something like that.

If you do want to format it that way, you have to define an epsilon, that is, a maximum distance from an integer number, and use integer formatting if the difference is smaller, and a float otherwise.

Something like this would do the trick:

public String formatDecimal(float number) {
  float epsilon = 0.004f; // 4 tenths of a cent
  if (Math.abs(Math.round(number) - number) < epsilon) {
     return String.format("%10.0f", number); // sdb
  } else {
     return String.format("%10.2f", number); // dj_segfault
  }
}

Format decimal value to currency with 2 decimal places

You are looking for "0:C2" see Standard Numeric Format Strings

Precision specifier: Number of decimal digits

Sample:

 String.Format("{0:C2}", 5d); //results in $5.00
 String.Format("{0:C2}", 5.9d); //results in $5.90
 String.Format("{0:C2}", 5.123d); //results in $5.12

How to format numbers as currency strings

Ok, based on what you said, I'm using this:

var DecimalSeparator = Number("1.2").toLocaleString().substr(1,1);

var AmountWithCommas = Amount.toLocaleString();
var arParts = String(AmountWithCommas).split(DecimalSeparator);
var intPart = arParts[0];
var decPart = (arParts.length > 1 ? arParts[1] : '');
decPart = (decPart + '00').substr(0,2);

return '£ ' + intPart + DecimalSeparator + decPart;

I'm open to improvement suggestions (I'd prefer not to include YUI just to do this :-) )

I already know I should be detecting the "." instead of just using it as the decimal separator...

Decimal return in currency format

I know two solutions to solve this problem.

One

Return strings:

string money = yourValue.ToString("0.00");

Two

Use Round:

decimal money = Math.Round(yourValue, 2);

Parsed

It will always add .00 to integer values.

decimal money = decimal.Parse(yourvalue.ToString("0.00"));

How to format currency number to 2 decimal places, or none if no cents?

Since Java and Kotlin work hand in hand here is a Java Solution

One way of doing this would be to check if decimal number is similar to its int or long value

if (number == (int) number)
      {
          NumberFormat formatter = new DecimalFormat ("##");
          System.out.println (formatter.format (number));
      }
else
      {
          NumberFormat formatter = new DecimalFormat ("##.00");
          System.out.println (formatter.format (number));
      }

Format number with currency and two digits

You may utilize:

   value.ToString("C2")

or following your code:

   txtRe.Text += "Après " + i.ToString("C2") 

or even:

     Dim value As Double = 12345.6789
     Console.WriteLine(value.ToString("C", CultureInfo.CurrentCulture))
     Console.WriteLine(value.ToString("C2", CultureInfo.CreateSpecificCulture("fr")))

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