double pow (      double base,      double exponent );
long double pow ( long double base, long double exponent );
      float pow (       float base,       float exponent );

Raise to power

Returns base raised to the power exponent:

base^exponent

Parameters

base

Floating point value.

exponent

Floating point value.

Return Value

If the magnitude of the result is so large that it cannot be represented in an object of the return type, a range error occurs, returning HUGE_VAL with the appropiate sign and setting the value of the global variable errno to the ERANGE value.

If base is negative and exponent is not an integral value, or if base is zero and exponent is negative, a domain error occurs, setting the global variable errno to the value EDOM.

Portability

Example

/* pow example */
#include <stdio.h>
#include <math.h>

int main ()
{
  printf ("7 ^ 3 = %lf\n", pow (7,3));
  printf ("4.73 ^ 12 = %lf\n", pow (4.73,12));
  printf ("32.01 ^ 1.54 = %lf\n", pow (32.01,1.54));
  return 0;
}

Output:

7 ^ 3 = 343.000000
4.73 ^ 12 = 125410439.217423
32.01 ^ 1.54 = 208.036691

See also