Power

Explanation
The power function returns x to the power n. For n=2 you get the square of x. For n=0.5 you get the square root. Both x and n can be arbitrary real numbers but the function is not defined for all numbers. In particular, when x is negative and n is not an integer, an error might result.

Examples
power(2,3)   will return 8 power(25,0.5) will return 5 power(42,0)  will return 1 power(0,0)   will return 1 power(-3,2.5) will result in an error