My macbook startsup and goes to white screen (after using boot camp)

[poker2]

I partition my drive (35gb) using bootcamp and installed Windows 7.
Didn't like the way things were so I unpartition/ formated the windows part back to mac.

Now when I start my macbook i hear a chime and it gets stuck on a white screen. When I hear the chime, if i hold down option key then it asks me if i want to boot to mac harddrive. How do i make it automatically boot to the mac because that's the only one now. (so it's how it used to be)
*i am fairly new to mac*

 

[jav6454]

I partition my drive (35gb) using bootcamp and installed Windows 7.
Didn't like the way things were so I unpartition/ formated the windows part back to mac.

Now when I start my macbook i hear a chime and it gets stuck on a white screen. When I hear the chime, if i hold down option key then it asks me if i want to boot to mac harddrive. How do i make it automatically boot to the mac because that's the only one now. (so it's how it used to be)
*i am fairly new to mac*

Settings > Start-Up disk. There you can select the correct place to boot off from. It should be Macintosh HD or whatever you have named your HDD.