How do I exit os x disk utilities?

My computer froze and I went to restart it, but when it was booting back up it took me to os x disk utilities. I can't find a way to exit it. I've tried upon start up: command + R, command + option + p + r, and simply letting is restart but it always takes me back to disk utilities. I tried repairing disks but it doesn't do anything. Please help!