Raise a number to a given power
#include <math.h> double pow( double x, double y ); float powf( float x, float y ); long double powl( long double x, long double y );
The pow(), powf(), and powl() functions compute x raised to the power of y.
A domain error occurs if x = 0, and y ≤ 0, or if x is negative, and y isn't an integer. A range error may also occur.
The value of xy. For finite values of x less than 0 and finite non-integer values of y, these functions return NaN. The return value for a correct value that would cause underflow is 0.0.
#include <stdio.h> #include <stdlib.h> #include <math.h> int main( void ) { printf( "%f\n", pow( 1.5, 2.5 ) ); return EXIT_SUCCESS; }
produces the output:
2.755676
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | No |
Signal handler | No |
Thread | Yes |