Isn't that what the length statement does? Create the num_dob variable?
data hi.student (drop=i);
infile 'C:\Users\larkj\Desktop\STUDENT.DAT';
length num_dob 8;
input ssn 1-9 sex $ 11 term 17 type $ 19 div $ 21-24
major 26-30 ed $ 32 state $ 34-35 sat 37-40 satm 42-44
satv 46-48 gpa 50-53 rank 55-58 act 60-63 toefl 65-68
honor $ 70 ethnic 72 year_dob 101-102 month_dob 103-104
day_dob 105-106
;
num_dob= input(char_dob,mmddyy10.); /*<==== where does a value for char_dob come from??
it is not on the input statement*/
if char_dob eq '0' then call missing(num_dob);
else num_dob=input(char_dob,mmddyy10. ??);
Char_DOB = input(catx("/", month_dob, day_dob, year_dob),?? mmddyy8.); /* value assigned AFTER use above*/
Total_DOB = input(catx("/", month_dob, day_dob, year_dob),?? mmddyy8.);
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