How to add inline code to #| fig-cap: in quarto

This is a working quarto exmple:

---
title: "test"
format: revealjs
---

## Quarto example


```{r}
#| label: fig-plot_mtcars
#| fig-cap: nrow(mtcars).

plot(mtcars$mpg, mtcars$disp)
```

output:

How can I add a inline code to fig.cap::
desired output:

I have tried with #| fig-cap: paste("bla", nrow(mtcars))

>Solution :

You’ll need to tell the quarto YAML that you’re parsing an R expression to be evaluated. I.e.:

#| fig-cap: !expr nrow(mtcars)

For reference, see:

https://quarto.org/docs/computations/r.html#chunk-options