Using string interpolation in C# to print floating point values

Question

I'm trying to use string interpolation to print a floating point number to 3 decimal places.
Console.Writeline( $"{3.2, 8: F3}" ); However, this is printing "F3" in a field width of 8. Why is this happening. For example, Console.WriteLine($"{3.2M, 8: C2}"); accurately prints as $3.20 in a string field width of 8.

Answer 1

The space after the colon : causes the issue, you need to be careful about this in format strings:

Console.Writeline( $"{3.2, 8:F3}");  // Outputs 3.200

Test it in DotnetFiddle