cabs, cabsf, cabsl — absolute value of a complex number
Synopsis
#include <complex.h>
double cabs(double complex z);
float cabsf(float complex z);
long double cabsl(long double complex z);
Link with -lm.
Description
These functions return the absolute value of the complex number z. The result is a real number.
Versions
These functions first appeared in glibc in version 2.1.
Attributes
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
|---|---|---|
| cabs(), cabsf(), cabsl() | Thread safety | MT-Safe |
Conforming to
C99, POSIX.1-2001, POSIX.1-2008.
Notes
The function is actually an alias for hypot(a, b) (or, equivalently, sqrt(a*a + b*b)).
See Also
Colophon
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Referenced By
abs(3), cacosh(3), carg(3), casinh(3), catanh(3), ccos(3), ccosh(3), cexp(3), cexp2(3), cimag(3), clog(3), clog10(3), clog2(3), complex(7), conj(3), cpow(3), cproj(3), creal(3), csin(3), csinh(3), csqrt(3), ctan(3), ctanh(3), fabs(3), hypot(3).
The man pages cabsf(3) and cabsl(3) are aliases of cabs(3).