topic Re: Rounding down by 2 dp in SAS Programming

Rounding down by 2 dp

Adnan_Razaq — Mon, 29 Jan 2018 16:49:21 GMT

Hi,

What function can be used to round down a number by 2 dp, for instance if I have the value of 0.99856 how can I round this down to 0.99?

Many Thanks

Adnan

Re: Rounding down by 2 dp

Reeza — Mon, 29 Jan 2018 16:55:27 GMT

That's not rounding, that's truncation, rounding to 2 decimal places would be 1.00.

Note, please use full words, ie dp=decimal place is my assumption. Not everyone here will know your terminology.

data want;

x=0.99856;

y=floor(x*100)/100;
y=round(y, 0.01);

put x= y=;

run;

@Adnan_Razaq wrote:

Hi,

What function can be used to round down a number by 2 dp, for instance if I have the value of 0.99856 how can I round this down to 0.99?

Many Thanks

Adnan

Re: Rounding down by 2 dp

Astounding — Mon, 29 Jan 2018 16:59:59 GMT

Can you have negative numbers, such as:

-0.98776

If so, what result would you want to see?

One possible way to program this (depending on your answer):

x = int(100*x) / 100;

Re: Rounding down by 2 dp

jt742 — Tue, 24 Apr 2018 14:11:17 GMT

HI Reeza,

Thanks for this solution! Just a question about "y=round(y, 0.01)" as I'm not sure if it's necessary. When I run your code without it, it seems to work fine. Am I missing something? Thanks!

-Joey

Re: Rounding down by 2 dp

Reeza — Tue, 24 Apr 2018 20:10:44 GMT

It depends on what you want. Round will round the variable to the nearest second decimal place in this case. I think this is the same as using 8.2 format to display your data. However, 8.2 only controls the display, the value in the table would still be the actual value, so it depends on what you're trying to do overall.