# DeciMojo v0.2 for Mojo 25.2 - decimal and integer mathematics library **URL:** \ **Category:** Community Showcase\ **Created:** [March 27, 2025, 6:09pm UTC](https://forum.modular.com/t/decimojo-v0-2-for-mojo-25-2-decimal-and-integer-mathematics-library/1153 "2025-03-27T18:09:46Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![forfudan](https://sea1.discourse-cdn.com/flex001/user_avatar/forum.modular.com/forfudan/32/925_2.png) [@forfudan](https://forum.modular.com/u/forfudan)\ **Post date:** [March 27, 2025, 6:09pm UTC](https://forum.modular.com/t/decimojo-v0-2-for-mojo-25-2-decimal-and-integer-mathematics-library/1153/1 "2025-03-27T18:09:46Z")
For more information, please visit the repo of DeciMojo: [https://github.com/forfudan/decimojo](https://github.com/forfudan/decimojo) Version 0.2.0 marks a significant expansion of DeciMojo with the introduction of `BigInt` and `BigUInt` types, providing unlimited precision integer arithmetic to complement the existing fixed-precision `Decimal` type. Core arithmetic functions for the `Decimal` type have been completely rewritten using Mojo 25.2’s `UInt128`, delivering substantial performance improvements. This release also extends mathematical capabilities with advanced operations including logarithms, exponentials, square roots, and n-th roots for the `Decimal` type. The codebase has been reorganized into a more modular structure, enhancing maintainability and extensibility. With comprehensive test coverage, improved documentation in multiple languages, and optimized memory management, v0.2.0 represents a major advancement in both functionality and performance for numerical computing in Mojo. ### ⭐ New - Add `BigInt` and `BigUInt` implementation with unlimited precision integer arithmetic. - Implement full arithmetic operations for `BigInt` and `BigUInt`: addition, subtraction, multiplication, division, modulo and power operations. - Support both floor division (round toward negative infinity) and truncate division (round toward zero) semantics for mathematical correctness. - Add complete comparison operations for `BigInt` with proper handling of negative values. - Implement efficient string representation and parsing for `BigInt` and `BigUInt`. - Add advanced mathematical operations for `Decimal`: square root and n-th root. - Add logarithm functions for `Decimal`: natural logarithm, base-10 logarithm, and logarithm with arbitrary base. - Add exponential function and power function with arbitrary exponents for `Decimal`. ### 🦋 Changed - Completely re-write the core arithmetic functions for `Decimal` type using `UInt128` introduced in Mojo 25.2. This significantly improves the performance of `Decimal` operations. - Improve memory management system to reduce allocations during calculations. - Reorganize codebase with modular structure (decimal, arithmetics, comparison, exponential). - Enhance `Decimal` comparison operators for better handling of edge cases. - Update internal representation of `Decimal` for better precision handling. ### ❌ Removed - Remove deprecated legacy string formatting methods. - Remove redundant conversion functions that were replaced with a more unified API. ### 🛠 Fixed - Fix edge cases in division operations with zero and one. - Correct sign handling in mixed-sign operations for both `Decimal`. - Fix precision loss in repeated addition/subtraction operations. - Correct rounding behavior in edge cases for financial calculations. - Address inconsistencies between operator methods and named functions. ### 📚 Documentation and testing - Add comprehensive test suite for `BigInt` and `BigUInt` with over 200 test cases covering all operations and edge cases. - Create detailed API documentation for both `Decimal` and `BigInt`. - Add performance comparison benchmarks between DeciMojo and Python’s decimal/int implementation. - Update multi-language documentation to include all new functionality (English and Chinese). - Include clear explanations of division semantics and other potentially confusing numerical concepts. ---
**Author:** ![bgreni](https://avatars.discourse-cdn.com/v4/letter/b/e495f1/32.png) [@bgreni](https://forum.modular.com/u/bgreni)\ **Post date:** [March 27, 2025, 6:18pm UTC](https://forum.modular.com/t/decimojo-v0-2-for-mojo-25-2-decimal-and-integer-mathematics-library/1153/2 "2025-03-27T18:18:12Z")
Wow, awesome work. Very excited to see a `BigInt` type here! ---
**Author:** ![forfudan](https://sea1.discourse-cdn.com/flex001/user_avatar/forum.modular.com/forfudan/32/925_2.png) [@forfudan](https://forum.modular.com/u/forfudan)\ **Post date:** [March 28, 2025, 8:42pm UTC](https://forum.modular.com/t/decimojo-v0-2-for-mojo-25-2-decimal-and-integer-mathematics-library/1153/3 "2025-03-28T20:42:10Z")
Thanks! BigInt is quite important in many situations. ---
**Author:** ![forfudan](https://sea1.discourse-cdn.com/flex001/user_avatar/forum.modular.com/forfudan/32/925_2.png) [@forfudan](https://forum.modular.com/u/forfudan)\ **Post date:** [June 16, 2025, 11:59am UTC](https://forum.modular.com/t/decimojo-v0-2-for-mojo-25-2-decimal-and-integer-mathematics-library/1153/4 "2025-06-16T11:59:24Z")
DeciMojo v0.3.1 is released with the introduction of the `BigDecimal` type. It also supports Mojo v25.3 and pixi now. ---
**Author:** ![system](https://us1.discourse-cdn.com/flex001/uploads/modular/original/1X/2751e0fbdc595a99718b216730957e9db4448cfd.jpeg) [@system](https://forum.modular.com/u/system)\ **Post date:** [December 13, 2025, 12:00pm UTC](https://forum.modular.com/t/decimojo-v0-2-for-mojo-25-2-decimal-and-integer-mathematics-library/1153/5 "2025-12-13T12:00:04Z")
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