| '%' [[Index]':'] ['-'] [Width] ['.' Precision] ArgType |
| '%' | starts the placeholder. If you want to insert a literal % character, then you must insert two of them : %%. |
| Index ':' | takes the Index-th element in the argument array as the element to insert. If index is omitted, then the zeroth argument is taken. |
| '-' |
tells Format to left-align the inserted text. The default behaviour is to right-align inserted text. This can only take effect if the Width element is also specified. |
| Width |
the inserted string must have at least Width characters. If not, the inserted string will be padded with spaces. By default, the string is left-padded, resulting in a right-aligned string. This behaviour can be changed by the usage of the '-' character. |
| '.' Precision |
Indicates the precision to be used when converting the argument. The exact meaning of this parameter depends on ArgType. |
- ArgType
| D | Decimal format. | format('%d', [-123]) | -123 |
| E | Scientific format. | format('%e', [12345.678]) | 1.23456780000000E+004 |
| F | Fixed point format. | format('%f', [12345.678]) | 12345.68 |
| G | General number format. | format('%g', [12345.678]) | 12345.678 |
| M | Currency format. | format('%n', [12345.678]) | 12,345.68 |
| N | Number format. | format('%m', [12345.678]) | ₩12,346 |
| P | Pointer format. | format('%p', [addr(text)]) | 0019F35C |
| S | String format. | format('%s', ['Hello']) | Hello |
| U | Unsigned decimal format. | format('%u', [123]) | 123 |
| X | hexadecimal format. | format('%x', [140]) | 8C |
- 참고
https://www.freepascal.org/docs-html/rtl/sysutils/format.html
http://www.delphibasics.co.uk/RTL.asp?Name=format
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