Function prime

prime(num: number): number
Returns the nth prime number.
Parameters
- num: number
  The "n" in "nth prime number" (the index of the prime number in the set of all prime numbers)
Returns number
Example
```
// The 100th prime number is 523
const prime = Chalkboard.numb.prime(100);
```
- Defined in Chalkboard.numb.ts:748