Rounding down by 2 dp

[Adnan_Razaq]

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

[Reeza · Accepted solution]

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;

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@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

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[jt742]

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

[Reeza]

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.

[Astounding]

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;