How are you generating your output?
Do you mean that you have numeric values that will appear in a table and that you want to enclose, possibly a range of them, in {}
such as
{123.4}?
You may have to provide additional information such as rules, number of decimals to display if any. The most likely approach would be a custom picture format such as shown here:
proc format library=work;
picture braces
low-high = '00009.9}' (prefix='{' );
run;
data have;
input x;
datalines;
-123
0
234.5
;
proc print data=have;
var x;
format x braces.;
run;
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