The output of a expression in Julia can be suppressed by ending the line with ;. It might not be what you want, but it will help clean up a document. See https://github.com/JunoLab/Weave.jl for report generation and documentation therein.
If you search “hide” in the Weave documentation, and navigate to code chunks, you see:
Markdown code chunks are defined using fenced code blocks with options following on the same line. e.g. to hide code from output you can use:
```julia; echo=false`
Based on your recent posts, I would suggest asking these small questions in Slack channel instead for quick and small response.