pow-Raise the Base to a Floating-Point Exponent

Interface

F_TYPE pow (F_TYPE x, F_TYPE y)

Description

pow() raises a floating-point base x to a floating-point exponent y. The value of pow(x,y) is computed as e**(y ln(x)) for positive x. If x is 0 or negative, see your language reference manual.

Passing a NaN input value to pow() produces a NaN result, for y not equal to 0. For pow(NaN,0), see your language reference manual.

Exceptions

Exceptional Argument       Routine Behavior

y ln(x) > ln(max_float)    Overflow

y ln(x) < ln(min_float)    Underflow


Fortran-Exceptional
Argument                   Routine Behavior

x < 0                      Invalid argument

x = 0 and y < 0            Invalid argument

x = 0 and y = 0            Invalid argument

x = +infinity and y = 0    Invalid argument

x = 1 and |y| = infinity   Invalid argument


ANSI C-Exceptional
Argument                   Routine Behavior

|x| = 1 and |y| =          Invalid argument
infinity

x < 0 and y is not         Invalid argument
integral

pow-Raise the Base to a Floating-Point Exponent

Interface

Description

Exceptions

See Also