# quickmaths

A small, pretty command line calculator.

Features expression evaluation, variable assignment, an interactive mode, pretty
output, and a variety of preset constants and functions focused on pure mathematics,
data science, and computer science.

## Constants

|       Name       |  Tokens  |  Type  |        Value        |
--------------------------------------------------------------
|  Euler's Number  |   `e`    |   f64  | `2.718281828459045` |
|   Golden Ratio   |  phi, ϕ  |   f64  | `1.618033988749895` |
|        Pi        |  pi, π   |   f64  | `3.141592653589793` |
|     Root Two     |    √2    |   f64  | `1.414213562373095` |


## Built-in functions

### Mathematics

- `fix`: fix a float to *n* digits.
- `log`: logarithm. Defaults to natural logarithm (ln).
- `sqrt`/`√`: square root. 

### Data Science

- `avg`: average an arbitrary set of numbers.

### Computer Science

- `bin`: convert an integer to a binary string or vice versa.
- `hex`: convert an integer to a hexadecimal string or vice versa.
- `oct`: convert an integer to an octal string or vice versa.

## Libraries

- [evalexpr](https://crates.io/crates/evalexpr)
- [termion](https://crates.io/crates/termion)