Function isRational

isRational(num: number, tolerance?: number): boolean
Checks if a number is rational.
Parameters
- num: number
  The number to check.
- Optionaltolerance: number = 1e-8
  Tolerance for approximation (optional, defaults to 1e-8).
Returns boolean
Example
```
const yes = Chalkboard.numb.isRational(0.75); // Returns true
const no = Chalkboard.numb.isRational(Chalkboard.PI()); // Returns false
```
- Defined in Chalkboard.numb.ts:564