## More Or Less

### Instructions

Create 4 functions:

- `more` that takes 1 argument and adds 1 to it.
- `less` that takes 1 argument and subtracts 1 from it.
- `add` that takes 2 arguments and adds them together.
- `sub` that takes 2 arguments and subtracts the second argument from the first.

All the functions must return the result of the operations specified above.

### Notions

- [Functions](https://nan-academy.github.io/js-training/examples/functions.js)
- [Primitives and Operators](https://nan-academy.github.io/js-training/examples/primitive-and-operators.js)