numr

numr is an innovative text calculator designed for natural language expressions, featuring a user-friendly vim-style Terminal User Interface (TUI). It streamlines complex calculations into simple commands, allowing users to evaluate expressions quickly and intuitively.

Key Features

• Natural Language Calculations: Effortlessly perform calculations such as 20% of 150, or convert currencies with commands like $100 in euros.
• Variable Support: Define variables easily, e.g., tax = 15%, and utilize them in expressions like 100 + tax.
• Unit Conversions: Supports conversions for various units including length, weight, time, temperature, and data sizes.
• Real-time Currency Conversions: Automatically fetches live exchange rates for multiple currencies including USD, EUR, GBP, JPY, and BTC.
• Vim-style Editing: Enjoy efficient editing with normal and insert modes, complete with familiar key bindings for seamless navigation.
• Mouse Support: Scroll through the interface easily using a mouse wheel or trackpad.
• File Persistence: Saves calculations automatically to a designated config directory, allowing customization of user files.
• Syntax Highlighting: Clear distinction for numbers, operators, variables, units, and currencies enhances readability.
• Commenting Support: Include comments with lines starting with # that are ignored in calculations.
• Toggle Wrap Mode: Easily switch text wrapping with results aligned at the bottom.
• Automatic Running Total: The footer displays a dynamic sum of all calculations.

Operations & Examples

Supported Operations:

• Arithmetic: Perform basic operations like addition, subtraction, multiplication, and division.

  10 + 20           → 30
  100 - 25          → 75
  6 * 7             → 42
  100 / 4           → 25
  

• Percentage Calculations: Handle percentage operations seamlessly.

  20% of 150        → 30
  100 + 15%         → 115
  

• Functions: Use built-in functions for summation, averages, and other calculations.

  sum(10, 20, 30)   → 60
  avg(10, 20, 30)   → 20
  

Supported Units

The calculator supports numerous units across categories such as:

• Length: km, m, cm, mm, miles, feet, inches
• Weight: kg, g, mg, lbs, oz
• Time: months, weeks, days, hours, minutes, seconds
• Temperature: Celsius, Fahrenheit
• Data Sizes: TB, GB, MB, KB
• Currencies: USD, EUR, GBP, JPY, RUB, ILS, BTC

This project combines functionality and an intuitive interface, making calculations faster and easier than conventional methods.
For more details or to get started, explore the repository on GitHub.