Problem While installing Elixir for vs code

Hi ! I ws as trying to install elixir on my windows so i successfully installed it and i can see my elixir IDE showing on my start menu.

Now i was trying to setup my vs code for Elixir so I installed one extension named : ElixirLS: Elixir support and debugger

Now i was trying to create a new file named : elixir1.exs
and i was trying to run it on my terminal of vs code using this command : elixir elixir1.exs

PS D:\BE.MECHATRONICS\Elixir> elixir elixir1.exs
elixir : The term 'elixir' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, 
or if a path was included, verify that the path is correct and try again.
At line:1 char:1
+ elixir elixir1.exs
+ ~~~~~~
    + CategoryInfo          : ObjectNotFound: (elixir:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

pls help me out !!