pow
| Defined in header
<math.h>
|
||
| float powf( float base, float exp );
|
(since C99) | |
| double pow( double base, double exp );
|
||
| long double powl( long double base, long double exp );
|
(since C99) | |
Computes the value of base raised to the power exp or iexp.
[edit] Parameters
| base | - | base as floating point value |
| exp | - | exponent as floating point value |
| iexp | - | exponent as integer value |
[edit] Return value
base raised by power (exp or iexp).
Domain error occurs if base is 0 and exp is less than or equal to 0. NAN is returned in that case.
Domain error occurs if base is negative and exp is not an integer value. NAN is returned in that case.
Range error occurs if an overflow takes place. HUGEVAL is returned in that case.
|
If domain error occurs and math_errhandling & MATH_ERRNO is nonzero, errno is set to EDOM. If domain error occurs and math_errhandling & MATH_ERREXCEPT is nonzero, the invalid floating point exception is raised. If range error occurs and math_errhandling & MATH_ERRNO is nonzero, errno is set to ERANGE. If range error occurs and math_errhandling & MATH_ERREXCEPT is nonzero, the overflow floating point exception is raised. |
(since C99) |
[edit] See also
| returns e raised to the given power (ex) (function) |
|
| computes natural (base e) logarithm (to base e) (ln(x)) (function) |
|
| computes square root (√x) (function) |
|
| (C99)
|
computes cubic root (3√x) (function) |
|
C++ documentation for pow
|
|