1. The problem asks to evaluate $4^\circ$, which means $4$ degrees. 2. Degrees are a unit of angle measurement, not a number to be raised to a power. 3. If the question means to evaluate $4^\circ$ as an angle, it is simply $4$ degrees. 4. If the question means to evaluate $4^0$ (four raised to the zero power), recall the rule that any nonzero number raised to the zero power equals 1. 5. Since the symbol \degree (°) is often confused with zero, clarify that $4^0 = 1$. 6. Therefore, if the question is $4^0$, the answer is 1. Final answer: $1$