Function formatSignedInt

formatSignedInt(n: number, min_len?: number, fill_string?: string): string
Formats a number with an explicit sign prefix (+, -, or ±).
Parameters
- n: number
  The number to format.
- Optionalmin_len: number
  The minimum length of the numeric part (padding applied to absolute value).
- Optionalfill_string: string
  The string used to pad the numeric part (default: ' ').
Returns string
The formatted string including the sign.
Remarks
Zero (0) is denoted with '±'.
Example
```
formatSignedInt(42); // "+42"
formatSignedInt(-5); // "-5"
formatSignedInt(0); // "±0"
formatSignedInt(5, 3, '0'); // "+005"
```
- Defined in string/format.ts:42