Re: subtle but important

[Craig Markwardt <craigmnet(at)cow.physics.wisc.edu>]

Randall Skelton <rhskelto@atm.ox.ac.uk> writes:
> On Fri, 27 Apr 2001, Liam E. Gumley wrote:
> 
> > This is a subtle but important point. DOUBLE() is a type conversion
> > function [snip]
> 
> While we are on the subject of 'subtle but important points' in IDL...
> 
> I also learned today that for integers the default length is 16-bit unless
> you use the "COMPILE_OPT DEFINT32" statement.  Try "print, 1000*1000" in
> IDL.

That's why I often use "print, 1000L*1000L".  Appending "L" to
integers saves a lot of grief later on.  The COMPILE_OPT approach
works in newer versions, but not in IDL 5.2 or older.

Craig

-- 
--------------------------------------------------------------------------
Craig B. Markwardt, Ph.D.         EMAIL:    craigmnet@cow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
--------------------------------------------------------------------------