how to repeat weekly values for all the days in the week?

[srikanthyadav44]

dear all

i have the data on interest rates in weekly frequency. 

i would like to convert it into daily frequency by repeating the same rates throughout the week.

please suggest a SAS code to perform this function 

my data is in the following format 

date	interest_rate
30-Jun-2021	3.8898
07-Jul-2021	3.8419
14-Jul-2021	3.8099
20-Jul-2021	3.7744
28-Jul-2021	3.7299

i want output in the following format 

date	interest_rate
30-Jun-2021	3.8898
01-Jul-2021	3.8898
02-Jul-2021	3.8898
03-Jul-2021	3.8898
04-Jul-2021	3.8898
05-Jul-2021	3.8898
06-Jul-2021	3.8898
07-Jul-2021	3.8419
08-Jul-2021	3.8419
09-Jul-2021	3.8419
10-Jul-2021	3.8419
11-Jul-2021	3.8419
12-Jul-2021	3.8419
13-Jul-2021	3.8419
14-Jul-2021	3.8099
15-Jul-2021	3.8099
16-Jul-2021	3.8099
17-Jul-2021	3.8099
18-Jul-2021	3.8099
19-Jul-2021	3.8099
20-Jul-2021	3.7744
21-Jul-2021	3.7744
22-Jul-2021	3.7744
23-Jul-2021	3.7744
24-Jul-2021	3.7744
25-Jul-2021	3.7744
26-Jul-2021	3.7744
27-Jul-2021	3.7744
28-Jul-2021	3.7299
29-Jul-2021	3.7299
30-Jul-2021	3.7299
31-Jul-2021	3.7299
01-Aug-2021	3.7299
02-Aug-2021	3.7299
03-Aug-2021	3.7299

thanking in advance 

[Kurt_Bremser · Accepted solution]

In a data step, OUTPUT each observation as is, then run a DO loop for date from date + 1 TO date + 6 with an additional OUTPUT.

[Ksharp]

data have;
infile cards expandtabs;
input date  : date11. interest_rate;
format date date11.;
cards;
30-Jun-2021 	3.8898
07-Jul-2021	 3.8419
14-Jul-2021	 3.8099
20-Jul-2021	 3.7744
28-Jul-2021	 3.7299
;

data want;
merge have have(firstobs=2 keep=date rename=(date=_date));
output;
do date=date+1 to ifn(_date-1=.,date+6,_date-1);
 output;
end;
drop _date;
run;