cabs(3) — Linux manual page


cabs(3)                 Library Functions Manual                 cabs(3)

NAME         top

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

LIBRARY         top

       Math library (libm, -lm)

SYNOPSIS         top

       #include <complex.h>

       double cabs(double complex z);
       float cabsf(float complex z);
       long double cabsl(long double complex z);

DESCRIPTION         top

       These functions return the absolute value of the complex number
       z.  The result is a real number.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       │ Interface                           Attribute     Value   │
       │ cabs(), cabsf(), cabsl()            │ Thread safety │ MT-Safe │

STANDARDS         top

       C11, POSIX.1-2008.

HISTORY         top

       glibc 2.1.  C99, POSIX.1-2001.

NOTES         top

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

SEE ALSO         top

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

COLOPHON         top

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Linux man-pages 6.9.1          2024-05-02                        cabs(3)

Pages that refer to this page: abs(3)cacosh(3)carg(3)casinh(3)catanh(3)ccos(3)ccosh(3)cexp2(3)cexp(3)cimag(3)clog10(3)clog2(3)clog(3)conj(3)cpow(3)cproj(3)creal(3)csin(3)csinh(3)csqrt(3)ctan(3)ctanh(3)fabs(3)hypot(3)complex(7)