[racket] command prompt

I've been trying to figure out how to create a cli app. My first issue is to
create a prompt for the user to enter text so I can use  what they enter.
I've somewhat found out how to make outside commands to other programs, but
I've ben scouring the documentation for some time and I can't find what I'm
looking for. Is there anyone out there with an example I can use or the
right documentation I've missed. Loving Racket alot, take care.

Isaiah
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