Environment Varaibles

To set an environment variable(permanent):
setx var_name value

To set an environment variable(till the command prompt open i.e., temporary):
set var_name=value
NOTE: To view the variable set using above command just use echo %var_name%

To view all the environment variables:
set

To view a particular environment variable value:
set var_name

To delete a environment variable set:
set "var_name="