There are three things you could do here:

1. Start the racket REPL, use `enter!` to run the program, and then
type in your expression. This is very similar to how DrRacket works.

2. Make sure the relevant things are `provide`d by your module, then
`require` the module and execute an expression. Here's an example:

[samth@huor:~/sw/plt/extra-pkgs/racket-lang-org (master) plt] cat a.rkt
#lang racket
(define x 1)
(provide x)
[samth@huor:~/sw/plt/extra-pkgs/racket-lang-org (master) plt] racket
-e "(require \"a.rkt\")" -e "(displayln x)"
1


3. Write the program you want as a module which uses `require` to
depend on the code you've already written, and then just run that
program as `racket program.rkt`.

I strongly recommend option 3, but any of them should work for you.

Sam

On Thu, Nov 21, 2019 at 2:57 PM Vignesh Krishnaraja
<[email protected]> wrote:
>
> I am trying to run a racket file from the command line.
>
> First thing I have to say is that when I run the program from the IDE (Dr. 
> Racket) it works perfectly fine. The program uses #lang racket.
>
> I tried using the -f to load the file and -e to evaluate my expression which 
> is "(mine-expr '((prompt1 prompt2)))"
> Racket is seeing ((prompt1 prompt2)) but it doesn't consider it as a list. I 
> don't know why it is not treating it as a list since I used the ' .
>
> When I run the exact same expression on DrRacket I get " '(("C" prompt1 
> prompt2)) ".
>
> Also I noticed I was able to get some weird result when I escaped the space 
> between the two elements.
>
> What is the best way to evaluate an expression from command line using the 
> definitions of a file just like the way we can on DrRacket?
>
> Is there any other way to evaluate an expression through command line. Please 
> let me know! I almost have no clue with racket. I am trying to reuse the 
> racket program in my project. Thanks!
>
>
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