what is the value of any power with exponent zero?

http://www.regentsprep.org/regents/math/algebra/ao5/lexp.htm

a^0 = 1, provided that a ≠ 0

The value of any power with an exponent of zero is always 1. This is a fundamental rule in mathematics.

To understand why, let's explain how to get this result:
1. Start with the definition of a power: a number raised to an exponent means multiplying the number by itself that many times.
2. When the exponent is zero, we need to multiply the number by itself zero times.
3. But what does it mean to multiply a number by itself zero times? By convention, any number raised to the power of zero is defined to be 1.

So, whether the base number is positive, negative, or even zero itself, any power with an exponent of zero will always evaluate to 1.