Exact currency arithmetic

Money values, explicit rounding and allocation that preserves the total.

Path

docs/examples/language/money.gb

Category

Language

Source

import io;
import json;
import money;
let subtotal = money.Money("19.99", "GBP");
let total = subtotal.multiply(1.20, "halfEven");
io.println(total); /* GBP 23.99 */
io.println(total.minorUnits); /* 2399 */
for (share in total.split(3)) {
    io.println(share); /* GBP 8.00, GBP 8.00, GBP 7.99 */
}
let refund = money.fromMinor(-5, "GBP").allocate([1, 2]);
for (share in refund) {
    io.println(share); /* GBP -0.02, GBP -0.03 */
}
io.println(json.stringify(total)); /* {"amount":"23.99","currency":"GBP"} */