1. The problem is to evaluate $-100^0$. 2. Recall the rule: any nonzero number raised to the power of 0 is 1. 3. However, the expression $-100^0$ means the negative of $100^0$, not $(-100)^0$. 4. Calculate $100^0$: $$100^0 = 1$$ 5. Apply the negative sign: $$-100^0 = -1$$ 6. Therefore, the value of $-100^0$ is $-1$.