Scroll to navigation

CABS(3) Library Functions Manual CABS(3)

NAME

cabs, cabsf, cabsl - absolute value of a complex number

LIBRARY

Math library (libm, -lm)

SYNOPSIS

#include <complex.h>
double cabs(double complex z);
float cabsf(float complex z);
long double cabsl(long double complex z);

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

STANDARDS

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

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

2022-10-09 Linux man-pages 6.01