double
cabs(complex);
long double
cabsl(long double complex);
float
cabsf(float complex);
The cabs() function computes the complex absolute value (also called
norm, modulus, or magnitude) of z, without undue underflow or overflow.
It is specified by cabs(x+iy) = hypot(x, y)
hypot(3), math(3), sqrt(3)
The cabs() function conforms to ISO/IEC 9899:1999(E).
4th Berkeley Distribution January 28, 2003 4th Berkeley Distribution