How to test if a number has specific digits in it?

y=input('Input a number')
y=num2str(int)-'0';
if y(1:size(y)) == 1 || 4 || 8
    disp ('Your number contains the digits 1, 4 or 8')
else 
    disp ('Your number does not contain the digits 1, 4 or 8')
end

I am trying to test if a number, of any size, contains the digits 1, 4 or 8. I don't get any error messages but the test doesn't work as it says it contains the digits for numbers like '565'

Answer 1

[Yongjian Feng]

Once you convert it to string, use contains function to check if a digit is there.

[Yongjian Feng]

y=input('Input a number')
y=num2str(y);
if contains(y, '1') || contains(y, '4') || contains(y, '8')
    disp ('Your number contains the digits 1, 4 or 8')
else 
    disp ('Your number does not contain the digits 1, 4 or 8')
end

[Stephen23]

Replace

y=input('Input a number')
y=num2str(y);

with simpler and safer:

y = input('Input a number','s');

and then simply:

if any(ismember(y,'148'))