Add single quotes to a string

Question

I try to add single quotes to a string but don't see how to do it. For instance I would like to replace ABC by 'ABC'.

I have played with paste, cat, print but don't see how to do it.

Any solution?

Thanks, Vincent

Answer 1

Just use paste:

R> paste("'", "ABC", "'", sep="")
[1] "'ABC'"

or the new variety

R> paste0("'", "ABC", "'")
[1] "'ABC'"