CashMachine.js

/* ###### CONSTANT ###### */
var BILLS = [200, 100, 50, 20, 10, 5, 2, 1] // ARRAY of bills with really cheap bills like coins

/* ###### SMART ALGORITHM ###### */
var cash_machine = function (amount) { // FUNCTION
    var i = 0; // iterator
    while (amount > 0) { // check if their is still money to give for the customer
        if (BILLS[i] <= amount) { // try with the larger bill
            console.log("Cash Machine give me a bill of " + BILLS[i] + "€"); // GIVE ME MY MONEY!!!
            amount = amount - BILLS[i]; // reduce the amount of money we still have to gave for the customer
        } else { // try with a smaller bill
            i = i + 1; // increment i variable of 1
        }
    }
}

/* ###### TESTS ###### */

cash_machine(42);
//cash_machine(25);
//cash_machine(128);
//cash_machine(201);
//cash_machine(1024);