How to switch between Shells?

Just you need to enter the available shell name in the command prompt to move from one shell to another shell.

Example:
 volcano@volcano-laptop:~$ echo $0
bash
volcano@volcano-laptop:~$ ksh
$ echo $0
ksh
$ sh
$ echo $0
sh
$ exit
$ echo $0
ksh
$ exit
volcano@volcano-laptop:~$ echo $0
bash
volcano@volcano-laptop:~$ csh
%