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cabs() -- Mathematics Function (libm) Complex absolute value function #include <math.h> double cabs(z) struct { double r, i; } z; cabs() computes the absolute value, or modulus, of its complex argument z. The absolute value of a complex number is the length of the hypotenuse of a right triangle whose sides are given by the real part r and the imaginary part i. The result is the square root of the sum of the squares of the parts. Example For an example of this function, see the entry for acos(). See Also hypot(), lib