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Description
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The Format function
provides 'C' like formatting of multiple of simple
data types into a string. It provides very precise
control over this formatting.
The Formatting parameter defines
how the Data array is manipulated
into the returned string.
The Formatting string can comprise
a mix of ordinary characters (that are passed
unchanged to the result string), and data
formatting characters. This formatting is best
explained by the example code.
In simple terms, each data formatting substring
starts with a % and ends with a
data type indicator :
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d
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= Decimal (integer)
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e
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= Scientific
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f
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= Fixed
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g
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= General
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m
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= Money
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n
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= Number (floating)
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p
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= Pointer
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s
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= String
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u
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= Unsigned decimal
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x
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= Hexadecimal
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The general format of each formatting substring is
as follows:
%[Index:][-][Width][.Precision]Type
where the square brackets refer to optional
parameters, and the : . -
characters are literals, the first 2 of which are
used to identify two of the optional
arguments.
Version
2 of this function is for use
within threads. You furnish the
FormatSettings record before
invoking the call. It takes a local copy of global
formatting variables that make the routine thread
safe.
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Notes
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Various formatting options, such as
DecimalSeparator and
CurrencyString are used for some
of these formatting options. See the more specific
versions of data display commands, such as
CurrToStrF for details.
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Related commands
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CurrencyDecimals
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Defines decimal digit count in the Format
function
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CurrencyFormat
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Defines currency string placement in curr
display functions
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CurrencyString
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The currency string used in currency display
functions
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CurrToStrF
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Convert a currency value to a string with
formatting
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DecimalSeparator
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The character used to display the decimal
point
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FloatToStrF
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Convert a floating point value to a string
with formatting
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FormatCurr
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Rich formatting of a currency value into a
string
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FormatDateTime
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Rich formatting of a TDateTime variable into
a string
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FormatFloat
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Rich formatting of a floating point number
into a string
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NegCurrFormat
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Defines negative amount formatting in
currency displays
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ThousandSeparator
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The character used to display the thousands
separator
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Example code : Showing
all of the formatting data types
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var
text : string;
begin
// Just 1
data item
ShowMessage(Format('%s',
['Hello']));
// A mix
of literal text and a data
item
ShowMessage(Format('String =
%s', ['Hello']));
WriteLn('');
//
Examples of each of the data
types
ShowMessage(Format('Decimal =
%d', [-123]));
ShowMessage(Format('Exponent
= %e', [12345.678]));
ShowMessage(Format('Fixed =
%f', [12345.678]));
ShowMessage(Format('General =
%g', [12345.678]));
ShowMessage(Format('Number
= %n', [12345.678]));
ShowMessage(Format('Money =
%m', [12345.678]));
ShowMessage(Format('Pointer =
%p', [addr(text)]));
ShowMessage(Format('String
= %s', ['Hello']));
ShowMessage(Format('Unsigned
decimal = %u', [123]));
ShowMessage(Format('Hexadecimal =
%x', [140]));
end;
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Show full unit code
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Hello
String = Hello
Decimal =
-123
Exponent
= 1.23456780000000E+004
Fixed =
12345.68
General =
12345.678
Number
= 12,345,68
Money =
?12,345.68
Pointer =
0069FC90
String
= Hello
Unsigned decimal = 123
Hexadecimal =
8C
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Example code : Using the
index, width and precision values
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begin
// The
width value dictates the output
size
// with
blank padding to the left
// Note
the <> characters are added to show
formatting
ShowMessage(Format('Padded
decimal =
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