csqrt, csqrtf, csqrtl

Article
06/05/2017

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Retrieves the square root of a complex number, with a branch cut along the negative real axis.

Syntax

_Dcomplex csqrt(   
   _Dcomplex z   
);  
_Fcomplex csqrt(   
   _Fcomplex z   
);  // C++ only  
_Lcomplex csqrt(   
   _Lcomplex z   
);  // C++ only  
_Fcomplex csqrtf(   
   _Fcomplex z   
);  
_Lcomplex csqrtl(   
   _Lcomplex z   
);

Parameters

z
A complex number.

Return Value

The square root of z. The result is in the right half-plane.

Input	SEH Exception	`_matherr` Exception
± QNAN, IND	none	_DOMAIN
- ∞	none	_DOMAIN

Remarks

Because C++ allows overloading, you can call overloads of csqrt that take and return _Fcomplex and _Lcomplex values. In a C program, csqrt always takes and returns a _Dcomplex value.

Requirements

Routine	C header	C++ header
`csqrt`, `csqrtf`, `csqrtl`	<complex.h>	<ccomplex>

For more compatibility information, see Compatibility in the Introduction.

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