Exponentiation

The classic method of calculating exponentiation:


 * 1) Start your output number at 1.
 * 2) If the exponent is odd, multiply the output by the base, and subtract 1 from the exponent.
 * 3) Divide the exponent by 2, and multiply the base by itself.
 * 4) If the exponent is still greater than 0, loop back to step 2.