need to reload ubuntu as windows is intalled after it..... (was dual boot before )

was havin dual bootin windows & ubuntu .... then i formated my pc but i left linux drive as it is ,   now windows is working properly but there is no sign for loding linux what should i do ?????i know i have 2 recoonect to GRUB but dont know the proceedure ....plz help me out    kind regards .thank u in advance

Reloading grub...

Here is a link to the official ubuntu tutorial...https://help.ubuntu.com/community/RecoveringUbuntuAfterInstallingWindows