I need to know whether my projectline goes between the goal posts on 3d plot. Should i use if stamentet or while loop and if so how? This is what i've tried

if xyz(:,1) >= 31.25
elseif xyz(:,1) <= 36.75 
elseif xyz(:,2) >= 98 
elseif xyz(:,2) <= 102
elseif xyz(:,3) >= 3
     disp('successful');
else
     disp('unsuccessful');
end

[John D'Errico]

Please learn to format pasted in code to be readable. Use the "{} Code" button for that purpose. I've done that for you here this time.