FAQ: Static Variables and Methods - Modifying Static Variables

This community-built FAQ covers the “Modifying Static Variables” exercise from the lesson “Static Variables and Methods”.

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In step 1 I originaly used
It seemed to work fine, but it wasn’t accepted as the right code to use. Was this just a quirk of the system that checks for correct answers, or is there some reason that “+=1” is better than “++”?

In step 2 I originally used
totalMoney += this.Money;
Again it worked fine but it wants me to use
totalMoney += inputMoney;
Again, does this make a difference - is there some reason why it’s better to use inputMoney than this.money? Although the results are the same in practice, it seems slightly neater to me to define totalMoney according to the money value in each ATM, rather than the inputMoney. (Or even better, to have a separate method to set totalMoney according to the sum of money in each ATM, rather than increasing and decreasing it with deposits and withdrawals.)

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