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Contributor
Posts: 45

# loops

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

Accepted Solutions
Solution
‎07-03-2017 10:21 AM
Super User
Posts: 10,239

## Re: loops

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

---------------------------------------------------------------------------------------------
Maxims of Maximally Efficient SAS Programmers
How to convert datasets to data steps
How to post code

All Replies
Super User
Posts: 10,239

## Re: loops

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.

---------------------------------------------------------------------------------------------
Maxims of Maximally Efficient SAS Programmers
How to convert datasets to data steps
How to post code
Contributor
Posts: 45

## Re: loops

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

Contributor
Posts: 45

## Re: loops

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
Super User
Posts: 10,239

## Re: loops

[ Edited ]

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;``````

---------------------------------------------------------------------------------------------
Maxims of Maximally Efficient SAS Programmers
How to convert datasets to data steps
How to post code
Contributor
Posts: 45

## Re: loops

Thanks for the explanation , if possible can you please tell the code
Solution
‎07-03-2017 10:21 AM
Super User
Posts: 10,239

## Re: loops

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

---------------------------------------------------------------------------------------------
Maxims of Maximally Efficient SAS Programmers
How to convert datasets to data steps
How to post code
Contributor
Posts: 30

## Re: loops

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 .

☑ This topic is solved.