# std::complex<T>::operator+(unary), operator-(unary)

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< cpp‎ | numeric‎ | complex

| (1) |
template< class T > std::complex <T> operator+( const std::complex <T>& val ); |  | (until C++20)
template< class T > constexpr std::complex <T> operator+( const std::complex <T>& val ); |  | (since C++20)
| (2) |
template< class T > std::complex <T> operator-( const std::complex <T>& val ); |  | (until C++20)
template< class T > constexpr std::complex <T> operator-( const std::complex <T>& val ); |  | (since C++20)

Implements the analogs of the unary arithmetic operators for complex numbers.

1) Returns the value of its argument
2) Negates the argument

### Parameters

val | - | the complex number argument

### Return value

1) a copy of the argument, std::complex <T>(val)
2) negated argument, std::complex <T>(-val.real(), -val.imag())

### See also

operator+operator-operator*operator/ | performs complex number arithmetics on two complex values or a complex and a scalar (function template)

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