Function zeroPad

zeroPad(num: number, length: number): string
Pad a number with zeros to a given length
Parameters
- num: number
  {number}
- length: number
  {number}
Returns string
zero padded number
Example
```
zeroPad(1, 2) // '01'
zeroPad(1, 3) // '001'
```
- Defined in number-time/src/toText.ts:10