if elseif function not working properly

Hey, this is my code and it doesnt work if I try to get something in the 3rd or 4th quadrant. Can someone tell me where my mistake is?

function [ romannum ] = quadrant( x,y )

if x>0, y>0
    fprintf('Input coordinates will be in quadrant I. \n')
elseif x<0,y>0
    fprintf('Input coordinates will be in quadrant II. \n')
elseif x<0,y<0 
    fprintf('Input coordinates will be in quadrant III. \n')
elseif x>0, y<0
    fprintf('Input coordinates will be in quadrant IV. \n')
end

end

Answer 1

[the cyclist]

This syntax

if x>0, y>0

is wrong. It should be

if x>0 & y>0

assuming you mean "and".

[David Phung]

Thank you so much! I cant believe I overlooked that.