# evpf - postfix evaluator evpf (**ev**aluate **p**ost**f**ix is a simple postfix expression evaluator written as a learning project in rust. It supports both command line and interactive mode. ## Command line mode evpf where `` is a postfix expression like `20 30 + 11 -` etc. Currently only 4 operators are supported: `+`, `-`, `*` and `/`. (In command line mode, `*` has to be escaped using `\*` to work properly.) ## Interactive mode Interactive mode displays a prompt where expressions can be evaluated by typing into the prompt (line editing and session-history supported by `rustyline`. evpf> In interactive mode, apart from entering expressions, the following commands are supported * `q` or `Q` - quit * `?` or `h` or `H` - help