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FileMaker Pro Custom Functions

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RoundToEven ( number ; precision )

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Average rating: 3.2 (17 votes)
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Michael Horak, *COMMENT Visual Realisation
http://comment.cjb.net

Rounds number to specified precision, using the round-to-even rule - also known as Bankers' rounding.

Sample Input:

RoundToEven ( 0.5 ; 0 )
RoundToEven ( 1.5 ; 0 )

RoundToEven ( 0.045 ; 2 )
RoundToEven ( 0.055 ; 2 )

Sample Output:

0
2

0.04
0.06

/* RoundToEven function Author *COMMENT Visual Realisation Format RoundToEven ( number ; precision ) Parameters number - any numeric expression or field containing a numeric expression precision - any numeric expression or field containing a numeric expression Data type returned number Description Rounds number to specified precision, using the round-to-even rule - also known as Bankers' rounding. January 25, 2006 */ Let ( [ rem = Mod ( number * 10^precision ; 1 ) ; prev = Mod ( Int ( number * 10^precision ) ; 10 ) ] ; Case ( rem = 0.5 and not Mod ( prev ; 2 ) ; Truncate ( number ; precision ) ; Round ( number ; precision ) ) )
Then copy & paste into FileMaker Advanced's Edit Custom Function window.

Click here to copy To Clip Manager if you have myFMbutler's Clip Manager installed

Description:

For a detailed explanation of the round-to-even rule (Bankers' rounding), see
http://en.wikipedia.org/wiki/Significance_arithmetic#The_round-to-even_rounding_rule

This function is not recursive.

Note: these functions are not guaranteed or supported by BrianDunning.com. Please contact the individual developer with any questions or problems.

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FileMaker Pro Custom Functions

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