# Decimal   [![Build Status]][travis] [![Latest Version]][crates.io]
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[crates.io]: https://crates.io/crates/rust-decimal
A Decimal implementation written in pure Rust suitable for financial calculations that require significant integral and fractional digits with no round-off errors.
The binary representation consists of a 96 bit integer number, a scaling factor used to specify the decimal fraction and a 1 bit sign. Because of this representation, trailing zeros are preserved and may be exposed when in string form. These can be truncated using the `normalize` or `round_dp` functions.
[Documentation](https://docs.rs/rust_decimal/)
## Usage
Decimal numbers can be created in a few distinct ways. The easiest and most optimal method of creating a Decimal is to use the procedural macro within the `rust_decimal_macros` crate:
```rust
// Procedural macros need importing directly
use rust_decimal_macros::*;
let number = dec!(-1.23);
```
Alternatively you can also use one of the Decimal number convenience functions:
```rust
use rust_decimal::Decimal;
// Using an integer followed by the decimal points
let scaled = Decimal::new(202, 2); // 2.02
// From a string representation
let from_string = Decimal::from_str("2.02").unwrap(); // 2.02
// Using the `Into` trait
let my_int : Decimal = 3i32.into();
// Using the raw decimal representation
// 3.1415926535897932384626433832
let pi = Decimal::from_parts(1102470952, 185874565, 1703060790, false, 28);
```
## Features
* [postgres](#postgres)
## `postgres`
This feature enables a PostgreSQL communication module. It allows for reading and writing the `Decimal`
type by transparently serializing/deserializing into the `NUMERIC` data type within PostgreSQL.