Aligning Numbers on the Decimal Separator [Ron Petrusha]

The composite formatting feature in the .NET Framework makes it easy to left-align or right-align a value in a fixed-width field. If the alignment component of a format item in a composite format string is negative, its corresponding argument is left-aligned. If the alignment component is positive, its corresponding argument is right-aligned. For instance, the following example assigns random numbers to an eleven-element array and displays their values. In the output, the array index is left-aligned in a five-character field, and the array value is right-aligned in a twelve-character field.

[Visual Basic]

Dim rnd As New Random()

Dim values(10) As Double

Console.WriteLine("{0,-5}{1,12}", "Index", "Value")

For ctr As Integer = values.GetLowerBound(0) To values.GetUpperBound(0)

    values(ctr) = rnd.NextDouble()

    Console.WriteLine(" {0,-5} {1,12:F6}", ctr, values(ctr))

Next

[C#]

Random rnd = new Random();

double[] values = new double[11];

Console.WriteLine("{0,-5}{1,12}", "Index", "Value");

for (int ctr = values.GetLowerBound(0); ctr <= values.GetUpperBound(0); ctr++)

{

   values[ctr] = rnd.NextDouble();

   Console.WriteLine(" {0,-5} {1,12:F6}", ctr, values[ctr]);

}

The example produces output similar to the following:

Index      Value

 0         0.682236

 1         0.827866

 2         0.927542

 3         0.670535

 4         0.023612

 5         0.353050

 6         0.685052

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