big_dec 0.1.2+12

A library for big calculations.

BigDec

A library for big calculations.
Hecho en Puerto Rico por Radamés J. Valentín Reyes
Co-engineered by Copilot and Gemini

Note: This library uses high-performance Uint64List limb storage to handle arbitrary-precision calculations (defaulting to 200+ decimal places) with significantly reduced heap overhead.

Import

import 'package:big_dec/big_dec.dart';

Constructors & Parsers

You can now convert from standard Dart types directly into BigDec while maintaining a specific precision cap.

From BigInt

BigInt largeInt = BigInt.parse("12345678901234567890");
BigDec bigDec = BigDec.fromBigInt(largeInt, precision: 200);

From Int

BigDec bigDec = BigDec.fromInt(42, precision: 200);

From Double

BigDec bigDec = BigDec.fromDouble(3.14159, precision: 200);

From String

BigDec bigDec = BigDec.fromString("1.23456789");

Addition

BigDec bigDec1 = BigDec.fromString("1.5");
BigDec bigDec2 = BigDec.fromString("1.5");
BigDec result = bigDec1.add(bigDec2);
print(result.toStringAsFixed(0));

Subtraction

BigDec bigDec1 = BigDec.fromString("3.36");
BigDec bigDec2 = BigDec.fromString("1.5");
BigDec result = bigDec1.subtract(bigDec2);
print(result.toStringAsFixed(4));

Multiplication

BigDec bigDec1 = BigDec.fromString("1.5");
BigDec bigDec2 = BigDec.fromString("3");
BigDec result = bigDec1.multiply(bigDec2);
print(result.toStringAsFixed(4));

Division

BigDec bigDec1 = BigDec.fromString("1");
bigDec1.setDecimalPrecision(100);
BigDec bigDec2 = BigDec.fromString("3");
BigDec result = bigDec1.divide(bigDec2);
print(result.toStringAsFixed(100));

Decimal Precision

Set a new decimal precision. Subsequent operations will adhere to this precision cap.

BigDec bigDec1 = BigDec.fromString("1");
BigDec updated = bigDec1.setDecimalPrecision(200);

Rounding & Truncation

BigDec bigDec1 = BigDec.fromString("1.5");

// Round
BigDec rounded = bigDec1.round();

// Floor
BigDec floorVal = bigDec1.floor();

// Ceil
BigDec ceilVal = bigDec1.ceil();

Absolute Value

BigDec bigDec1 = BigDec.fromString("-25");
BigDec result = bigDec1.abs();
print(result.toString());

Power

BigDec bigDec1 = BigDec.fromString("25");
BigDec result = bigDec1.pow(BigInt.from(4));
print(result.toString());

Square Root

BigDec bigDec1 = BigDec.fromString("25");
BigDec result = bigDec1.sqrt();
print(result.toString());

Component Getters

Access the underlying magnitude components as BigInt.

BigDec bigDec1 = BigDec.fromString("123.456");
print(bigDec1.integer); // 123
print(bigDec1.decimal); // 456

String Formatting

BigDec bigDec1 = BigDec.fromString("1.23456789");
print(bigDec1.toStringAsFixed(2)); // 1.23