evar

Welcome to evar, a feature-rich CLI calculator REPL! My goal was to create a modern, ergonomic, and simple calculator.

Features ✨

Basic Math Functions: Perform essential mathematical operations.

Supported operators: +, -, *, /, %, ^, !

Supported functions:
- Trigonometric Functions: sin, cos, tan, sec, csc, cot
- Inverse Trigonometric Functions: asin, acos, atan
- Hyperbolic Functions: sinh, cosh, tanh
- Exponential and Logarithmic Functions: sqrt, exp, exp2, ln, log2, log10, log
- Angle Conversion Functions: rad, deg
- Rounding Functions: floor, ceil, round
- Miscellaneous Functions: abs, log, ntroot

Mathematical Notation: Write expressions like 2 sin(x) instead of 2 * sin(x).

> 2sin(2pi/3)
1.7320508075688774
> 2 * sin(2 * pi / 3)
1.7320508075688774
> sqrt(3)
1.7320508075688772

Variable & Function Definition: Define your own variables and functions.

> let x = 3
3
> let y = 10
10
> let f(z, w) = z + w
> f(x, y)
13

Neat Error Handling: Easily understand errors.

> let f(x) = 
error: found end of input expected expression
  ┌─ <repl>:1:12
  │
1 │ let f(x) = 
  │ ---------- ^ found end of input expected expression
  │ │          
  │ while parsing this function definition

Persistent History: Keep a record of your calculations.
Realtime Input Highlight: See your input highlighted as you type.
Radian & Degrees Mode: Switch between radian and degrees mode.
And More...

Inspiration 💡

evar is inspired by eva, another CLI calculator written in Rust.

Installation 🛠️

Usage 🚀

Modern ergonomic math calculator inspired by eva

Usage: evar [OPTIONS]

Options:
  -a, --angle-unit <ANGLE_UNIT>  Angle Unit [default: radian] [possible values: radian,
 degree]
      --no-color                 Enable colored output
  -f, --fix <FIX>                Number of decimal places in output (0-63) [default: No
ne]
  -d, --debug                    Print parsed expression for debug purpose
  -h, --help                     Print help
  -V, --version                  Print version

Contributing 🤝

Contributions are welcome via GitHub.

License 📜

This project is licensed under the MIT License.