Unable to run current chunk of code - RStudio

I am unable to run the chunk of code in my .rmd file in RStudio 1.1.453.
It simply does not work. Please help.

Please check the screenshot, highlighted options are not working except settings.

You don't need {r} at the end.

This will do the job:

```{r}
1+2
2+2
```

Hope this helps.

Yes, it worked. Thanks a lot :slight_smile: