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eva

calculator REPL with arbitrary precision

TLDR

Calculate expression
$ eva "[2 + 3 * 4]"
Calculate with functions
$ eva "[sin(pi/2)]"
Use radian mode for trigonometric functions
$ eva --radian "[sin(pi/2)]"
Interactive REPL mode
$ eva
Set decimal precision (number of fixed decimal places, 1-64)
$ eva --fix [20] "[pi]"
Change output radix/base (1-36)
$ eva --base [16] "[255]"

SYNOPSIS

eva [options] [expression]

DESCRIPTION

eva is a calculator REPL and CLI written in Rust for evaluating mathematical expressions. It supports standard arithmetic, trigonometric functions, logarithms, and constants like pi and e.In interactive REPL mode, previous results are available as _ and history can be recalled. Pass an expression directly on the command line for one-off evaluation.eva provides a quick command-line calculator with more intuitive syntax than bc.

PARAMETERS

INPUT

Mathematical expression string to evaluate (non-interactive).
-f, --fix N
Number of decimal places in output (1-64, default 10).
-b, --base N
Radix of calculation output (1-36, default 10).
-r, --radian
Use radians for trigonometric functions.
-h, --help
Display help information.
-V, --version
Show version information.

INSTALL

sudo pacman -S eva
brew install eva
nix profile install nixpkgs#eva

CAVEATS

Complex expressions may need quoting to avoid shell interpretation. Variables do not persist in one-shot command mode; use the interactive REPL for multi-step calculations.

HISTORY

eva was created as a modern command-line calculator, providing an alternative to bc and similar tools with a more intuitive syntax and additional features.

SEE ALSO

bc(1), calc(1), qalc(1)