# reduce()
The reduce method reduces the collection to a single value, passing the result of each iteration into the subsequent iteration:
const collection = collect([1, 2, 3]);
const total = collection.reduce((carry, item) => carry + item);
// 6
The value for carry on the first iteration is null; however, you may specify its initial value by passing a second argument to reduce:
const total = collection.reduce((carry, item) => carry + item, 4);
// 10