topic Re: Specifying the width of format/informat. in SAS Programming

Specifying the width of format/informat.

Chikku — Wed, 22 Jan 2014 18:32:39 GMT

Hi All,

I have a query with regards to the width(10) specified in the below format lines.

format income comma10.2;

format taxpaid dollar10.2;

format savings euro10.2;

We know that the length of numeric variables is 8.

Then what exactly is this width,i could not understand.we can keep any value for width or how exactly i can understand this.

Please let me know you thoughts.

Thank you:)

Re: Specifying the width of format/informat.

Tom — Wed, 22 Jan 2014 19:00:34 GMT

Formats tell SAS how to display the value, not how to store it. SAS only has two data types, floating point numbers and fixed length character strings.

So DOLLAR10.2 says to use 10 digits to display the value.

Try this little program.

data _null_;

x=today();

put x=

/ x= date9.

/ x= mmddyy10.

/ x= dollar10.2

/ x= time8.

;

run;

Re: Specifying the width of format/informat.

Fugue — Wed, 22 Jan 2014 19:34:06 GMT

To expand on what Tom is saying, the default length of a numeric variable is 8 bytes (not to be confused with 8 digits or 8 characters). The largest integer that SAS can store in a numeric variable with the default length of 8 (bytes) is 9,007,199,254,740,992.

Formats are just a way for SAS to display the stored numeric variable.

Re: Specifying the width of format/informat.

kuridisanjeev — Thu, 23 Jan 2014 11:17:10 GMT

HI,

Default length for a Char variables in SAS is 8 Charecter's.but where as default length for a numeric variable is 8 Bytes,Not 8 digits.which means Apprx One Byte can Accommodates two or more digits..

As said by Fugue,we can store max 16 digits in a numeric variable .again number of digits we can store is vary from One OS to Other OS.

Length in Bytes	Significant Digits Retained	Largest Integer Represented Exactly
3	3	8,192
4	6	2,097,152
5	8	536,870,912
6	11	137,438,953,472
7	13	35,184,372,088,832
8	15	9,007,199,254,740,992

Source :SASSupport.Com.

Thanks,

Sanjeev.K