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CABS(3) Linux Programmer's Manual CABS(3)
cabs, cabsf, cabsl - absolute value of a complex number
#include <complex.h> double cabs(double complex z); float cabsf(float complex z); long double cabsl(long double complex z); Link with -lm.
These functions return the absolute value of the complex number z. The result is a real number.
These functions first appeared in glibc in version 2.1.
For an explanation of the terms used in this section, see attributes(7). ┌──────────────────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├──────────────────────────────────────┼───────────────┼─────────┤ │cabs(), cabsf(), cabsl() │ Thread safety │ MT-Safe │ └──────────────────────────────────────┴───────────────┴─────────┘
C99, POSIX.1-2001, POSIX.1-2008.
The function is actually an alias for hypot(a, b) (or, equivalently, sqrt(a*a + b*b)).
abs(3), cimag(3), hypot(3), complex(7)
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2021-03-22 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)
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