Thursday Code Puzzler: Find The Missing Number

Thursday is code puzzler day here at DZone. The idea is simple: solve the coding problem as efficiently as you can, in any language or framework that you find suitable.

Note: Even though there really is nothing stopping you from finding a solution to this on the internet, try to keep honest, and come up with your own answer.  It's all about the participation!

Do you have code puzzlers that you'd like to share with the DZone community?  If so, please submit here. 

Find the Missing Number in the Array

Given a sorted array of numbers from 0 to n, with only one number missing in the sequence, write a method that will find that number.

Catch up on all our previous puzzlers here.