Ask yourself (play compiler):

Data Grades;
     Input Score;
     ID = _N_;
     IF       0 LE Score LT 65 THEN Grade='F';
     ELSE IF 65 LE SCORE LT 70 THEN Grade='D';
     ELSE IF 70 LE SCORE LT 80 THEN Grade='C';
     ELSE IF 80 LE SCORE LT 90 THEN Grade='B';
     ELSE IF       SCORE GE 90 THEN Grade='A';
Datalines;

• Where is the first place that the variable ID is encountered?
• Is it character or numeric?
• What is its length? (The number of bytes of storage used on disk for each value?)
• Where is the first place that the variable GRADE is encountered?
• Is it character or numeric?
• What is its length?