A decimal package for the Odin programming language.

This is a learning experiment for me, so it may not be fully featured or correctly implemented... yet!

This library uses i64 internally, which means:

• Values can range from approximately -9.2 × 10¹⁸ to 9.2 × 10¹⁸
• The maximum useful scale is 18 decimal places
• The product of two values must also fit in i64 — for example, multiplying two 10-digit numbers may overflow

Arithmetic operations (add, subtract, multiply, divide) will panic on overflow rather than silently returning incorrect results. If your use case involves very large values or high-precision chained operations, validate that intermediate results stay within i64 bounds.

For arbitrary-precision arithmetic, consider core:math/big.

Clone or copy this package into your project:

git clone https://github.com/lewidot/decimal.git

# or as a git submodule
git submodule add https://github.com/lewidot/decimal.git

Then import it using a relative path:

package main

import "decimal"

main :: proc() {
    price := decimal.make_decimal(1999, 2)  // 19.99
    qty := decimal.make_decimal(3, 0)       // 3
    total := decimal.multiply(price, qty)   // 59.97
}