Two to the fourth power is 16. This is determined by multiplying two by itself four times, which equals 16.
When a number is raised to the power of another number, it means that the original number is multiplied by itself the number of times of the power.
For example, two to the power of four is solved by multiplying two by itself four times. If the original number is a negative number, the entire negative number is multiplied by itself. Thus, if the problem is now negative two to the power of four, (-2) would be multiplied by itself four times, which is still equal to 16.
It should be noted that negative numbers with an even power will output a positive value, and negative numbers with an odd power will output a negative value. This is because a negative multiplied by a negative is a positive, and a positive multiplied by a negative stays a negative. In addition, any number with a power of zero equals one.