How to match files *.R and *Rd with find utility?

Question

I would like to find all files that end with .c, .R, or .Rd. I tried

find . -iname \"*.[cR]\" -print

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Answer 1

Here you go =)

find -name "*.c" -o -name "*.R" -o -name "*.Rd"

If it's just the 3 extension types that you are looking for, I'd recommend staying away from regex and just using the -o (as in "or") operator to compose your search instead.