How to select dates that are complete

[knveraraju91]

Dear ,

In my data I have a variable with complete and incomplete dates. I need to convert only complete dates into numeric form. 

Variable

2016-06-16

2015-05

I need convert only first observation into numeric form. Please help. Thank you.

[Emily_Zhang · Accepted solution]

if length(variable)=10 then variable_num=input(variable, yymmdd10.);

[Ksharp]

want=input(variable, ?? yymmdd10.);