print value of i if the logical statement is TRUE

If I have to print the value of i , when the logical statement is correct, where X and Y are vertices or triangles.. anyone please let me know. thanks

xp = 0; yp = 0;

for i = 1:length(T)

xT = X(T(i,:));

yT = Y(T(i,:));

[in,on] = inpolygon(xp,yp,xT,yT);

end

Answer 1

[Jonas]

if in
    disp(i)
end

[SALMAN KHAN]

Thank you man, it working.