The POWER® function
returns the result of raising the first argument to the power of the
second argument.

>>-POWER--(--expression-1--,--expression-2--)------------------><
- expression-1
- An expression that returns a value of any built-in numeric, character-string,
or graphic-string data type.1 A
string argument is cast to double-precision floating point before
evaluating the function. For more information about converting strings
to double-precision floating point, see DOUBLE_PRECISION or DOUBLE.
- expression-2
- An expression that returns a value of any built-in numeric data
type. If the value of expression-1 is equal
to zero, then expression-2 must be greater
than or equal to zero. If the value of expression-1 is
less than zero, then expression-2 must be
an integer value.
If the data type of the argument is decimal floating-point,
the data type of the result is DECFLOAT(34). Otherwise, the result
of the function is a double-precision floating-point number. If both
arguments are 0, the result is 1. If an argument can be null, the
result can be null; if an argument is null, the result is the null
value.
Note
Results involving
DECFLOAT special values: If either argument is decimal floating-point,
both arguments are converted to DECFLOAT(34). For decimal floating-point
values the special values are treated as follows:
- If either argument is NaN or -NaN, NaN is returned.
- If the first argument is Infinity or -Infinity, Infinity is returned.
- POWER(0,Infinity)
returns 0.
- POWER(1,Infinity)
returns 1.
- POWER(any number greater than 1,Infinity) returns Infinity.
- POWER(any number greater than 0 and less than 1,Infinity) returns
0.
- POWER(any number less than 0,Infinity) returns NaN. 2
- If either argument is sNaN or -sNaN, a warning
or error is returned. 2
