MATLAB: How can i see if a unit8 var exist or not

Question

Dear all, I have to check if a unit8 variabile type exist or not , do you know how can i do? thanks,

Answer 1

doc isa

A = rand(3,1) ;
A = uint8(A) ;
if isa(A,'uint8')
    fprintf('A is uint8\n')
else
    fprintf('A is not uint8\n')
end