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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.

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

C11, POSIX.1-2008.

HISTORY

glibc 2.1. C99, POSIX.1-2001.

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)

2024-05-02 Linux man-pages (unreleased)