JAVA "to the power of"

Sup /prog/?

I know this is a retarded question, but I need some help with a method I need to write. The method parameters are a double and an int (a and b, respectively)

I need to write a for loop in the method that raises a (the double) to the power of b (the int)

How the fuck do I do this?? Normally this wouldn't be a problem, but I'm burnt out from finals

>>5
a⁰ = 1.
a^b = a · a · ... · a (b times.)
a^-b = 1 / a^b.
0⁰ is undefined.