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Note:   The FORMAT statement is a compile time statement. To apply a format based upon the variable's value, the FORMAT must be applied at execution instead.

The PUTC function enables you to specify a character format at run time.

/* Create a sample dset.  TYPE designates whether */
/* it is interger (1) or decimal (2).             */

data a;
  input x type ;
datalines;
123 1
12.3 2
12 1
23.34 2
;

/* Create a format to specify which format to apply */
/* based upon value of TYPE.                        */

proc format;
  value type  1='4.'
              2='7.3';
run;

/* Apply format based upon variable value */

data new;
  set a;
  fmt=put(type,type.);
  value=putn(x,fmt);
run;

proc print;
run;

Obs       x      type    fmt    value

 1     123.00      1     4.     123
 2      12.30      2     7.3    12.300
 3      12.00      1     4.      12
 4      23.34      2     7.3    23.340

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