While I was taking a break from programming, I saw a random post on 9gag and I thought I make a script for it. A shop sells 1 chocolate at \$1. You can exchange 3 wrappers for 1 chocolate. If you have \$15, how many chocolates can you get?

``````var getChocolates = function(dollar) {
var price = 1,                      // Price per chocolate
wrappersForChocolate = 3;       // Amount wrappers per exchange

var chocolates = Math.floor(dollar/price);  // Round up no integers

if(chocolates < 0) return 0;

var count = 0;
do {
var exchanged = Math.floor(chocolates/wrappersForChocolate);
var leftover = chocolates%wrappersForChocolate;

var ate = exchanged * wrappersForChocolate;
count += (ate < wrappersForChocolate) ? chocolates : ate;
console.log('- chocolates:', chocolates, '- ate:', (ate < wrappersForChocolate) ? chocolates : ate);
chocolates = (chocolates < wrappersForChocolate) ? 0 : leftover + exchanged;

} while (chocolates);

return count;
}
``````

Let’s run this

``````var dollar = 15;
var chocolates = getChocolates(dollar);

console.log(chocolates);
// 22
``````

Test this app out
Dollar:

For \${{ dollar }}, you'll get {{ chocolates }} chocolates!!

``````var getChocolatesSimplified = function(dollar) {
var price = 1,                     // Price per chocolate
wrappersForChocolate = 3,      // Amount wrappers per exchange
exchangedToChocolate = 1;      // Amount chocolates after exhange

var chocolates = Math.floor(dollar/price); // Round up no integers
if(chocolates < 0) return 0;       // Returns 0;

var amountChocolate = Number(chocolates); // Copy amount

var count = 0;
do {
if(chocolates < wrappersForChocolate) break;
console.log('- chocolate:', chocolates);
chocolates = chocolates -wrappersForChocolate+exchangedToChocolate;
count++;

}
while (!(chocolates < wrappersForChocolate));

return amountChocolate + count;
}
``````