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rounding negative number in Maple T.A.

Posted on 2008-09-12 07:18 By Harry Garst (Maple Rating 1 17)
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Why gives Maple T.A. for the function

decimal(2,-0.625)

as an answer -0.62 instead of -0.63?

I could not find documentation on the decimal function. Where can I find it?

 

kind regards,

Harry Garst

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decimal(n, x) Returns x

Comment on 2008-09-15 11:17 from Hans van Walen (3)

decimal(n, x)

Returns x expressed as a floating-point number rounded to n decimal places.  When decimal(0,expression) is used with an expression, the system automatically inserts commas to separate thousands.

From http://www.brownstone.net/support/edu/authoring/

Regards, Hans van Walen

Dear Harry, Maple T.A.'s

Comment on 2008-09-17 09:05 from Carl Hickman (9)

Dear Harry,

Maple T.A.'s built-in functions, including decimal(n, x), are documented in the its online help system.

On your specific question, decimal(2,-0.625) returns -0.62 while decimal(2, 0.625) returns 0.63. Similarly, decimal(1, -0.65) = -0.6 while decimal(1, 0.65) = 0.7. What is common to all these cases is that Maple T.A. rounded up whenever the number lay right in the middle.

Thank you,

Carl Hickman

 

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