Masoud,

I think your second one should read...

if 10 ge percent ge -10 then bt10+1;

Jack Clark Research Analyst phone: 410-455-6256 fax: 410-455-6850 jclark@hilltop.umbc.edu

University of Maryland, Baltimore County Sondheim Hall, 3rd Floor 1000 Hilltop Circle Baltimore, MD 21250

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shouldn't the result of these be the same?

if percent >= -10 and percent <= 10 then bt10+1;

if 10 ge percent le -10 then bt10+1;