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Showing content from https://cplusplus.com/reference/complex/norm/ below:

function template

<complex>

template<class T> T norm (const complex<T>& x);

template<class T> T norm (const complex<T>& x);

double norm (ArithmeticType x);  // additional overloads

Norm of complex

The norm value of a complex number is its squared magnitude, defined as the addition of the square of both its real and its imaginary part (without the imaginary unit). This is the square of abs(x).

Only available for instantiations of

.

are provided for arguments of any

: In this case, the function assumes the value has a zero

component.

The return type is

, except if the argument is

or

(in which case, the return type is of the same type as the argument).

x

Complex value.

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// norm example
#include <iostream>     // std::cout
#include <complex>      // std::complex, std::norm

int main ()
{
  std::complex<double> mycomplex (3.0,4.0);

  std::cout << "The norm of " << mycomplex << " is " << std::norm(mycomplex) << '\n';

  return 0;
}

abs

Absolute value of complex (function template)

pow

Power of complex (function template)

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