Yeah dis simple but im still gonna put it..
Theres 3 ways 1 is for "Run" and 2 are for Other

WAY ONE:
The "Run" Program:
1. Go to your start menu and search or click "Run" (run CAN be on your Start Menu).
2. In the window that pops up, click the search bar thingy and type "%appdata%" WITHOUT the 2 "s.
3. Click "Ok" or press the "Enter" key on your keyboard.
4. Once a floder window pops up, click ".minecraft" THE NAME DOESNT HAVE THE 2 "s.
5. Thats it for this way!

WAY TWO:
Searcher/Searching:
1. Go to your Start Menu.
2. Click the search bar and type in "%appdata%" again, WITHOUT the 2 "s.
3. Click the "Roaming" floder again, the name doesnt have the 2 "s.
4. Click the floder ".minecraft" again, the name doesnt have the 2 "s
5. And Theres That Way!

WAY THREE:
The Launcher:
1. Open up the MC (Minecraft) Launcher.
2. Once the launch pops up, click "Options" again, the name doesnt have the 2 "s.
3. Once the Options window pops up, you will see where it says Game loacation on disk: C:UsersYOURPC'S PROFILENAMEAppdataRoaming.minecraft
4. Where it says that (above to see) click the part thats highlighted blue and it will take you there! the highlighted blue part says C:UsersYOURPC'S PROFILENAMEAppdataRoaming.minecraft

Thanks :D