csh software package provides Shell with C-like syntax, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install csh
csh is installed in your system.
Make ensure the csh package were installed using the commands given below,
$ sudo dpkg-query -l | grep csh *
You will get with csh package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Shells |
| Package | csh |
| Version | 20110502-2.2 |
| Description | Shell with C-like syntax |
| Sub Section | Shells |