Check that a string contains only (type of) character

[Riccardo]

Just wondering if there's a single function that will tell me whether a string contains only a specific characater. For example, if I have strings that are number codes of different lengths (e.g., "22313", "4525234", "33232") how can I flag ones that only contain "3"s in them (so yes to "3", "33", "333" and so on but no to "313", "3333313", "3338")?

[Miracle]

try the function index Character Functions

[Shmuel · Accepted solution]

To check does a numric variable contains only "3"s you may try:

 if compress(var,'3') ne '' then ok; else not_ok;

[Ksharp]

data have;
x="22313";output;
x="4525234";output;
x="33333";output;
run;
data want;
 set have;
 if verify(strip(x),'3') then flag='no ';
  else flag='yes';
run;