Negative squareroot quick and easy

I just need a quick and easy way to say The square root of xxxx is yyyyi so the square root of -100 is etc...

B = sqrt® ;

disp(B);

D = sprintf('R is negative. The square root of %1.1f is %1.1fi',R,B)

For some reason it says B is 0 for any number thats negative.

Answer 1

[Robert]

sprint is taking the real part of your complex result. Try:

sprintf('R is negative. The square root of %1.1f is %1.1fi',R,imag(B))