csqrt - chung-leong/qb GitHub Wiki
csqrt - Square root of complex number
float[2] csqrt ( float[2] $z )
csqrt() computes the square root of complex number z.
PARAMETERS:
z - The complex number to process. It can be one two-element array or an array of two-element arrays. z[0] should contain the real part and z[1] should contain the imaginary part.
Return Values:
The square root of z. The size of the return value will match that of z.
Version
1.0 and above.