csqrtf, csqrt, csqrtl

 

C

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Numerics

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Type-generic math

 

Complex number arithmetic

Types and the imaginary constant
complex Complex_I CMPLX	imaginary Imaginary_I I
Manipulation
cimag creal carg	conj cproj
Power and exponential functions
cexp clog	cpow csqrt
Trigonometric functions
ccos csin ctan	cacos casin catan
Hyperbolic functions
ccosh csinh ctanh	cacosh casinh catanh

 

Defined in header <complex.h>
float complex       csqrtf( float complex z );		(since C99)
double complex      csqrt( double complex z );		(since C99)
long double complex csqrtl( long double complex z );		(since C99)

Computes the complex square root of z with branch cut along the negative real axis.

Parameters

z

-

complex argument

Return value

The complex square root of z in the interval [0; +∞) along the real axis and in the interval (−∞; +∞) along the imaginary axis.

Example

Run this code

#include <stdio.h>
#include <complex.h>
 
int main(void)
{    
    double complex z = csqrt(-1.0 + 0.0*I);
    printf("%f%+fi\n", creal(z), cimag(z));
 
    z = csqrt(1.0 + 2.0*I);
    printf("%f%+fi\n", creal(z), cimag(z));
 
    return 0;
}

Output:

0.000000+1.000000i
1.272020+0.786151i

See also

cpowcpowfcpowl (C99)(C99)(C99)	computes the complex power function (function)
sqrtsqrtfsqrtl (C99)(C99)	computes square root (√x) (function)
C++ documentation for sqrt