Recoding using Formats
Back to recoding. In the examples of recoding so far, you built a new variable with the recoded value. You can achieve the desired grouping by printing the original continuous values of SCORE with a custom format you build. Only the printed value of SCORE is changed, the stored value remains the same.
This is done in two steps: 1 step to build the format and 1 step to use the format. The code:

PROC FORMAT;
VALUE SCORE  0-64  ='F'
            65-69  ='D'
            70-79  ='C'
            80-89  ='B'
            90-HIGH='A';
PROC PRINT DATA=GRADES;
     FORMAT SCORE SCORE.;
     TITLE 'Example 3';

The Proc Print output appears below.

Example 3

OBS    SCORE    ID    GRADE

 1       F       1      F
 2       D       2      D
 3       C       3      C
 4       C       4      C
 5       B       5      B
 6       A       6      A
 7       A       7      A
 8       A       8      A
 9       A       9      A

From the output above, the printed result is the same using GRADE - a character variable created with IF-THEN/ELSE structures - and SCORE, a numeric variable with integer values printed with a custom format. That's the beauty of formats, without rebuilding a dataset you can print any variable any way you want to.
The FORMAT statement in the PROC PRINT step associates the variable SCORE with the format SCORE. . (Don't forget the period).