[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] | Reference for unit 'sysutils' (#rtl)

# FloatToText

Return a string representation of a float, with a given format.

## Declaration

Source position: line 0

`function FloatToText(`
`Buffer: PChar;`
`Value: Extended;`
`format: TFloatFormat;`
`Precision: Integer;`
`Digits: Integer`
`):LongInt; function FloatToText(`
`Buffer: PChar;`
`Value: Extended;`
`format: TFloatFormat;`
`Precision: Integer;`
`Digits: Integer;`
`const FormatSettings: TFormatSettings`
`):LongInt;`

## Description

FloatToText converts the floating point variable Value to a string representation and stores it in Buffer. The conversion is governed by format, Precisison and Digits. more information on these parameters can be found in FloatToStrF. Buffer should point to enough space to hold the result. No checking on this is performed.

The result is the number of characters that was copied in Buffer.

## Errors

None.

## See also

FloatToStr |  | Convert a float value to a string using a fixed format.
FloatToStrF |  | Convert a float value to a string using a given format.

## Example

    Program Example68;

    { This program demonstrates the FloatToStrF function }

    Uses sysutils;

    Const Fmt : Array [TFloatFormat] of string[10] =
             ('general','exponent','fixed','number','Currency');

    Procedure Testit (Value :  Extended);

    Var I,J : longint;
        FF : TFloatFormat;
        S : ShortString;

    begin
      For I:=5 to 15 do
        For J:=1 to 4 do
          For FF:=ffgeneral to ffcurrency do
            begin
            Write (Value,'(Prec: ',I:2,', Dig: ',J,', fmt : ',Fmt[ff],') : ');
            SetLength(S,FloatToText (@S[1],Value,FF,I,J));
            Writeln (S);
            Write (-Value,'(Prec: ',I:2,', Dig: ',J,', fmt : ',Fmt[ff],') : ');
            SetLength(S,FloatToText (@S[1],-Value,FF,I,J));
            Writeln (S);
            end;
    end;

    Begin
      Testit (1.1);
      Testit (1.1E1);
      Testit (1.1E-1);
      Testit (1.1E5);
      Testit (1.1E-5);
      Testit (1.1E10);
      Testit (1.1E-10);
      Testit (1.1E15);
      Testit (1.1E-15);
      Testit (1.1E100);
      Testit (1.1E-100);
    End.

Documentation generated on: Feb 26 2014