I get this error:
code .is not recognised as an external or internal command, operable program or batch file
make sure you run the command in C folder
Then click window key + R and type rundll32.exe sysdm.cpl,EditEnvironmentVariables
then enter .
It will open Environment Variables edit Path variable .
Check whether you have C:\Users\{pc name}\AppData\Local\Programs\Microsoft VS Code\bin if not add it and run code -v in C folder cmd
This worked for me !