C++ <complex> - real() Function

The C++ <complex> real() function returns the real part of a complex number. The additional overloads is added in C++11 to provide the arguments of any fundamental arithmetic type. In this case, the function assumes the value has a zero imaginary component, and thus simply returns z converted to the proper type.

template<class T> T real (const complex<T>& z);

template<class T> T real (const complex<T>& z);

//additional overloads
double real (ArithmeticType z);

Parameters

`z`	Specify the complex number.

Return Value

Returns the real part of the complex number.

Example:

The example below shows the usage of real() function.

#include <iostream>
#include <complex>
using namespace std;
 
int main (){
  complex<int> z (5, 10);

  //display the real part of 
  //the complex number
  cout<<"Real part of z: "<<
      real(z)<<"\n";

  return 0;
}

The output of the above code will be:

Real part of z: 5

❮ C++ <complex> Library