regex - Using sed between specific lines only

Question

I have this sed command for removing the spaces after commas.

 sed -e 's/,s+/,/g' example.txt

How can i change it that, it will make the modification between only specific line numbers.

(e.g. between second and third lines).

Answer 1

Use:

sed '2,3s/,s+/,/g' example.txt