1. The problem is to find the value of the expression $-6 + 6$. 2. This is a simple addition problem involving integers. 3. When adding a negative number and a positive number, you subtract the smaller absolute value from the larger absolute value and take the sign of the number with the larger absolute value. 4. Here, $|-6| = 6$ and $|6| = 6$, so they are equal. 5. Adding $-6 + 6$ means the negative and positive values cancel each other out. 6. Therefore, $-6 + 6 = 0$. 7. The final answer is $0$.