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How Do You Convert A Number From Negative To Positive?

 I was just wondering if there is a way of converting a number from negative to positive within Reporting Services, ie remove the "-" sign from the front of the number?  One of the columns within my report contains a calculation which results in an integer, but it is always a negative number, even though it should really be positive (it would take too long to describe the exact reason for this, but it's to do with the underlying database, which I don't have access to anyway). When I right-click on the relevant cell within the table in Layout view in the Report Designer and go to Expression, there is a list of Conversion functions under the "Common Functions" heading but I can't find anything there which would convert a number from negative to positive.  Does anyone know how this can be achieved?

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Sorry if this question has been answered before--i tried a search but nothing came close to what i needed.

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Code Snippet

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