# Number Number operation

## Function

Number prototype function provides number stringization, fixed-point formatting, scientific notation and base conversion capabilities.

## API List

| API | Description |
| ------ | ------ |
| [Number.len](/en/docs/number/len) | Returns the number of characters after converting the number into a string. |
| [Number.to_number](/en/docs/number/to_number) | Returns the numeric value of the current number itself. |
| [Number.to_fixed](/en/docs/number/to_fixed) | Format a number to the specified decimal places. |
| [Number.to_string](/en/docs/number/to_string) | Convert a number to a string. |
| [Number.to_radix](/en/docs/number/to_radix) | Format the integer into a string according to the specified base. |
| [Number.to_char](/en/docs/number/to_char) | Generates a single-character string in Unicode code points. |
| [Number.to_exponential](/en/docs/number/to_exponential) | Format a number into a string in scientific notation. |
| [Number.is_int](/en/docs/number/is_int) | Determine whether the current number is an integer. |
| [Number.is_float](/en/docs/number/is_float) | Determine whether the current number runtime type is Float. |
| [Number.is_finite](/en/docs/number/is_finite) | Determine whether the current number is a finite number. |

## Examples

```bt
num = 255
result = num.to_radix(16)

// Output: ff
print result
```

## Notes

- Number method does not modify the original number value.