topic Re: loops in SAS Programming

loops

shivamarrora0 — Mon, 03 Jul 2017 13:33:54 GMT

I want to do using loops

Hi, i have below data

p=100000

interest=10%

will be the total amount after 4 years

i want below screen result

Year	Principal	interest	sum
1	100000	0.1	110000
2	11000	0.1	12100
3	12100	0.1	13310
4	13310	0.1	14641

Re: loops

Kurt_Bremser — Mon, 03 Jul 2017 13:39:44 GMT

Please show the code you already have (as this "problem" is really simple), and where it does not meet your expectations.

If you get unexpected messages in the log, post the log of the whole step.

Re: loops

shivamarrora0 — Mon, 03 Jul 2017 13:45:27 GMT

i just started learning SAS.

data test;

p=100000;

int=.10;

do i = 1 to 5;

p+p*int;

end;

run;

this code will over right the orginal data

Re: loops

shivamarrora0 — Mon, 03 Jul 2017 13:46:39 GMT

i just started learning SAS.

data test;
p=100000;
int=.10;
do i = 1 to 5;
p+p*int;

end;
run;

this code will over right the original data

Re: loops

Kurt_Bremser — Mon, 03 Jul 2017 13:51:31 GMT

@shivamarrora0 wrote:

i just started learning SAS.

data test;

p=100000;

int=.10;

do i = 1 to 5;

p+p*int;

end;

run;

this code will over right the orginal data

When you run a data step that does not have an explicit output statement, SAS will do one everytime it reaches the end of a data step iteration. See it as a hidden "output" right before the run statement.

If you do not have a statement that let's SAS iterate automatically (like a set that reads from a dataset), then SAS will only do one iteration, and that's it.

So in your case, SAS performs the loop, and then writes one observation with the final values.

To get a series of observations, add the explicit output statement:

data test;
p = 100000;
int = .10;
do i = 1 to 5;
  p + p * int;
  output;
end;
run;

Re: loops

shivamarrora0 — Mon, 03 Jul 2017 13:57:26 GMT

Thanks for the explanation , if possible can you please tell the code

Re: loops

Kurt_Bremser — Mon, 03 Jul 2017 14:06:08 GMT

@shivamarrora0 wrote:
Thanks for the explanation , if possible can you please tell the code

I already supplied the code.

I usually solve such problems a little differently, though:

data test;
base = 100000;
int = .10;
do i = 0 to 5;
  p = base * (1 + int) ** i;
  output;
end;
run;

With that formula, you can calculate the value for any year in one single step.

Re: loops

mehak — Fri, 20 Oct 2017 18:10:57 GMT

if i invest $5000 each year in account . after 15 yrs annual rate=10% and compound annual interest rate=10%.

also if a fixed term deposite of 25 yrs . Clculate total amount end of term with initial amount 1,00,000. annual interst rate 7%

.find compounded annually and monthly .