CABS(3) Linux Programmer s Manual CABS(3)

NAME 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 The cabs() function returns 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.


NOTES The function is actually an alias for hypot(a, b) (or, equivalently, sqrt(a*a + b*b)).

SEE ALSO abs(3), cimag(3), hypot(3), complex(7)

COLOPHON This page is part of release 3.22 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at

2008-08-11 CABS(3)