03. Numeric Values

Input value	`getType()` returns	`is<Type>()` function(s)
`42n`	`BigInt`	`isBigInt()`
`42`	`Number`	`isNumber()`
`3.14`	`Number`	`isNumber()`
`Infinity`	`Number`	`isNumber()`
`-Infinity`	`Number`	`isNumber()`
`NaN`	`Number`	`isNumber()`*

* Technically NaN is a number, so getType() will yield Number and isNumber() will return true for consistency. You would probably be better off using JavaScript's native isNaN() or Number.isNaN() if that's a concern.