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csqrtf, csqrt, csqrtl

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< c‎ | numeric‎ | complex
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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.

Contents

[edit] Parameters

z - complex argument

[edit] Return value

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

[edit] Example

#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

[edit] See also

(C99)(C99)(C99)
computes the complex power function
(function) [edit]
(C99)(C99)
computes square root (x)
(function) [edit]