0^0=1, Anything raised to the power of 0 is 1, including 0 itself!.
SORRY, AMENDING THE PREVIOUS ANSWER.
Depends on what you want to believe. Some say 0^0 is undefined. Some say it is ZERO. Some say it should be 1.
One argument for undefined:
Example
7^0 = 7^(1-1)= 7/7 = 1 Now do this for '0'
0^0 = 0^(1-1) = 0/0 which is not allowed...or undefined. (you cannot divide by '0' )