Nullish coalescing operator (??) in JavaScript

The nullish coalescing operator accepts two values and returns the second value if the first value is null or undefined.

The same can be done with methods as well.

Bonus:

We know that sometimesundefined can break the system this can handled with the help of default parameters.

As we handled packingCost as 0, then the final cost will be 40 and not as NaN.

Hope this helps 😀🫠