run two commands in one windows cmd line, one command is SET command

Question

[purpose]

This simple command sequence runs expected in the Windows\' CMD shell:

dir & echo hello

will list the files and direct

Answer 1

You can also use cmd /V /C (with /V to enable delayed expansion).
That is great to set an environment variable for just one command in Windows cmd.exe:

cmd /V /C "set "name=value" && echo !name!"
value

Note the usage of double-quotes in set "name=value" to avoid the extra space after value.
For instance, without double-quotes:

cmd /V /C "set name=value && echo '!name!'"
'value '

You would need to think to remove the space between value and &&:

cmd /V /C "set name=value&& echo '!name!'"
'value'

But using double-quotes makes the assignment more explicit.