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Manual Reference Pages  - CABS (3)

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

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Synopsis
Description
Note

#include <complex.h>

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

Link with -lm.

The cabs() function returns the absolute value of the complex number z. The result is a real number.

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

C99

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