About ten days ago I posted on reddit about development on android. Not apk development but actually writting code on an Android phone or tablet. I didn't get any good feedback at first until /u/jaumegreen suggested termux. It was exactly what i needed.
Ctrl is needed to work on consoles.
On my phone volume down emulates that key.
Next I had to share a storage space to allow files to be exposed.
cd /storage/emulated/0/ mkdir WorkingDir
and then I was off to the races.
made on nano via termux