[R] Echos for comment line (with #)

[Steven Yen]

I need help with what may be a simple option in R (or Rstudio)--to 
receive an echo of a comment line.

Running the following two-line script in plain R,

# adding
1+2

I did get the echo:

 > # adding
 > 1+2
[1] 3
 >

However, running the same lines in RStudio, the comment line does not 
appear in output:

 > 1+2
[1] 3
 >

Please help. Thanks.



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