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IDL problem with a long variable

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Name: astroinge
Date: August 25, 2005 at 09:09:38 Pacific
OS: Red Hat
CPU/Ram: 1 GB
Comment:

I am programming a process in IDL that will alow me to do a loop (for do begin) with a variable that is bigger than 60,000, but since it is too long, I have to declare it long somewhere. The value is extracted from a file and kept in the variable. Anyone wknow how to declare it long?

the for goes something like this:

for i=1,a-1 do begin
....
endfor

and the a is the long variable

thanks

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