conj(3) Library Functions Manual conj(3)

conj, conjf, conjl - calculate the complex conjugate

Math library (libm, -lm)

#include <complex.h>
double complex conj(double complex z);
float complex conjf(float complex z);
long double complex conjl(long double complex z);

These functions return the complex conjugate value of z. That is the value obtained by changing the sign of the imaginary part.

One has:

cabs(z) = csqrt(z * conj(z))

For an explanation of the terms used in this section, see attributes(7).

Interface Attribute Value
conj (), conjf (), conjl () Thread safety MT-Safe

C11, POSIX.1-2008.

glibc 2.1. C99, POSIX.1-2001.

cabs(3), csqrt(3), complex(7)

2023-10-31 Linux man-pages 6.7