Function toString

toString(source?: null | number, radix?: number): undefined | string
Returns a string value from the given number
Parameters
- Optionalsource: null | number
  the source value to inspect
- Optionalradix: number
  the radix for converting numeric value to string
Returns undefined | string
a string value from the given number
Author
David Hsing
Example
```
toString(1);    // '1'
```