Function roundTo

roundTo(num: number, positionalIndex: number): number
Rounds a number to the nearest positional notation index (or the nearest place value).
Parameters
- num: number
  Number
- positionalIndex: number
  The positional notation index (or place value)
Returns number
Example
```
// Returns 1240
const rounded = Chalkboard.numb.roundTo(1237, 10);
```
- Defined in Chalkboard.numb.ts:848