gananayantra-rusting

A professional-grade, multi-industry calculation engine written in Rust.

Overview

gananayantra provides reusable, library-first calculators across diverse domains. All functions are pure, return Result<f64, String>, and perform input validation.

This is a library crate. No CLI is included.

Features by Industry

Industry	Calculators
Finance	ROI, Time Value of Money, Compound Interest
Health	BMI, BMR, Body Fat %, Calorie Requirements
Energy	Power Consumption, Electricity Cost
Geo	Earth Distance (Haversine), Horizon Distance
Water	Pressure at Depth, River Flow Rate
Space	Orbital Velocity, Escape Velocity, Orbital Period
Utilities	Percentage Calculations

Installation

Add to your Cargo.toml:

[dependencies]
gananayantra-rusting = "1.1"

Usage Examples

Finance: Future Value Calculation

use gananayantra::finance::tvm::future_value;

let fv = future_value(10_000.0, 0.08, 5).unwrap();
println!("Future value: ${:.2}", fv); // ~$14,693.28

Health: BMI Calculation

use gananayantra::health::bmi;

let result = bmi(70.0, 1.75).unwrap();
println!("BMI: {:.2}", result); // ~22.86

Space: Orbital Velocity

use gananayantra::space::orbital_velocity;

let velocity = orbital_velocity(400_000.0).unwrap();
println!("LEO velocity: {:.2} m/s", velocity); // ~7,670 m/s

API Design

All public functions follow these principles:

Pure functions: No side effects or I/O
Type-safe: Strong typing with validation
Error handling: Returns Result<f64, String>
Documented: Rustdoc comments with examples

License

MIT License - see LICENSE for details.

Repository

GitHub: LimaniBhavik/gananayantra-rusting

gananayantra-rusting 1.1.2