Install emacs25 by entering the following commands in the terminal:
sudo apt update sudo apt install emacs25
Description:
GNU Emacs editor (with GTK+ GUI support)
GNU Emacs is the extensible self-documenting text editor. This package contains a version of Emacs with a graphical user interface based on GTK+ (instead of the Lucid toolkit provided by the emacs25-lucid package).
Homepage: http://www.gnu.org/software/emacs/
Version: 25.2+1-6
Section: editors