R help - May 2012 - Difference between 10 and 10L

Good Evening
We have been searching through the R documentation manuals without success on
this one.
What is the purpose or result of the "L" in the following?

n=10
and 
n=10L

or
c(5,10)
versus
c(5L,10L)

Thanks
Joe



Thanks
Joe


	[[alternative HTML version deleted]]

> class(10)
  [1] "numeric"
  > class(10L)
  [1] "integer"
  > class(10i)
  [1] "complex"

Why not 10I for integer?  Perhaps because "I" and "l"
look too similar, perhaps because "i" and "I" sound
too similar.  The "L" does not mean "long": integers
are 4 bytes long.

Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at
r-project.org] On Behalf
> Of brwin338
> Sent: Thursday, May 03, 2012 4:33 PM
> To: r-help at r-project.org
> Subject: [R] Difference between 10 and 10L
> 
> 
> Good Evening
> We have been searching through the R documentation manuals without success
on this
> one.
> What is the purpose or result of the "L" in the following?
> 
> n=10
> and
> n=10L
> 
> or
> c(5,10)
> versus
> c(5L,10L)
> 
> Thanks
> Joe
> 
> 
> 
> Thanks
> Joe
> 
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at r-project.org mailing list
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> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

On Thu, May 03, 2012 at 07:32:46PM -0400, brwin338
wrote:
> 
> Good Evening
> We have been searching through the R documentation manuals without success
on this one.
> What is the purpose or result of the "L" in the following?
> 
> n=10
> and 
> n=10L
> 
> or
> c(5,10)
> versus
> c(5L,10L)
Hi.

The help page ?"1L" or, equivalently, ?NumericConstants says

     An numeric constant immediately followed by ?L? is regarded as an
     ?integer? number when possible (and with a warning if it contains
     a ?"."?).

Try typeof(1) and typeof(1L).

Petr Savicky.