When setting environment variables, the following commands produce
different environment variables:
SET FIRST =two
The command SET now displays the following (along with all the
other environment variables):
Trailing spaces are not removed from the environment variable that is
being set. The variables are fully functional and may be addressed in
batch files by using the same syntax when referring to the variable.
For example, the following line
echo %FIRST %
will print the word "two" on the screen.