cabs, cabsf, cabsl - absolute value of a complex number
Math library (
libm,
-lm)
#include <complex.h>
double cabs(double complex z);
float cabsf(float complex z);
long double cabsl(long double complex z);
These functions return the absolute value of the complex number
z. The
result is a real number.
These functions were added in glibc 2.1.
For an explanation of the terms used in this section, see
attributes(7).
| Interface |
Attribute |
Value |
| cabs (), cabsf (), cabsl () |
Thread safety |
MT-Safe |
C99, POSIX.1-2001, POSIX.1-2008.
The function is actually an alias for
hypot(a, b) (or,
equivalently,
sqrt(a*a + b*b)).
abs(3),
cimag(3),
hypot(3),
complex(7)