# std::real(std::complex)

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< cpp‎ | numeric‎ | complex

Defined in header `<complex>` |  |
| (1) |
template< class T > T real( const std::complex <T>& z ); |  | (until C++14)
template< class T > constexpr T real( const std::complex <T>& z ); |  | (since C++14)
| (2) |
float real( float z ); template< class DoubleOrInteger > double real( DoubleOrInteger z ); long double real( long double z ); |  | (since C++11) (until C++14)
constexpr float real( float z ); template< class DoubleOrInteger > constexpr double real( DoubleOrInteger z ); constexpr long double real( long double z ); |  | (since C++14)

1) Returns the real component of the complex number `z`, i.e. z.real().

2) Additional overloads are provided for float, double, long double, and all integer types, which are treated as complex numbers with zero imaginary component. | (since C++11)

### Parameters

z | - | complex value

### Return value

the real component of `z`

### See also

real | accesses the real part of the complex number (public member function)
imag | returns the imaginary component (function template)

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