Linux command
eva 命令
文本
复制后可按需替换文件名、目录或参数。
常用示例
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
eva --fix [20] "[pi]"
Change output radix/base
eva --base [16] "[255]"
说明
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.
参数
- -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.
FAQ
What is the eva command used for?
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.
How do I run a basic eva example?
Run `eva "[2 + 3 * 4]"` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
What does -f, --fix _N_ do in eva?
Number of decimal places in output (1-64, default 10).