The ancient Greeks had these things called singly and doubly even numbers. An example of a singly even number is 14. It can be divided by 2 once, and has at that point become an odd number (7), after which it is not divisible by 2 anymore. A doubly even number is 20. It can be divided by 2 twice, and then becomes 5.
Your task is to write a function or program that takes an integer as input, and outputs the number of times it is divisible by 2 as an integer, in as few bytes as possible. The input will be a nonzero integer (any positive or negative value, within the limits of your language).
14 -> 1 20 -> 2 94208 -> 12 7 -> 0 -4 -> 2
The answer with the least bytes wins.
Tip: Try converting the number to base 2. See what that tells you.