eva

$ brew install eva

$ cargo install eva

$ git clone https://github.com/nerdypepper/eva.git
$ cargo run

eva 0.2.4
NerdyPepper <[email protected]>
Calculator REPL similar to bc(1)

USAGE:
    eva [FLAGS] [OPTIONS] [INPUT]

FLAGS:
    -h, --help       Prints help information
    -r, --radian     set eva to radian mode
    -V, --version    Prints version information

OPTIONS:
    -b, --base <RADIX>    set the radix of calculation output (2, 8, 10, 16 etc.)
    -f, --fix <FIX>       set number of decimal places in the output

ARGS:
    <INPUT>    optional expression string to run eva in command mode

> 1 + sin(30)
1.5
> floor(sqrt(3^2 + 5^2))
5
> 5sin(45) + cos(0)
4.53553

$ cargo install --force --path /path/to/eva

e      pi

pi * 5^2  # πr²

sin    cos     tan    csc    sec    cot    sinh   cosh   tanh
asin   acos    atan   acsc   asec   acot   ln     log    sqrt
ceil   floor   abs

deg(x) - convert x to degrees
rad(x) - convert x to radians

sqrt(sin(30)) # parentheses are mandatory for functions

log100        # no
log(100)      # yes

>12sin(45(2))             # 12 * sin(45 * (2))
12

>ceil(sqrt(3^2 + 5^2      # ceil(sqrt(3^2 + 5^2))
6

> sin(pi)
0.0548036650
> _^2
0.0030034417
>

> 1 + ln(-1)
Domain Error: Out of bounds!