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¶

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).

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¶

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

COLOPHON¶

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