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decimal

Started by irancplusplus, Feb 10 2012 06:53 PM

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2 replies to this topic

#1
irancplusplus

Posted 10 February 2012 - 06:53 PM

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hi
I think a decimal number is stored as a fixed point number (not a floating point number). that is, a decimal always has fixed number of digits after ".".
am I correct?

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#2
gregwarner

Posted 10 February 2012 - 07:42 PM

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Location:Arkansas

It's more than that. Decimal values store exact values whereas floating points are stored as binary fractions, and thus some decimal numbers do not have exact representations and must be approximated. Because of this, decimals have a smaller range than doubles, but higher precision.

Hofstadter's Law: It always takes longer than you expect, even when you take into account Hofstadter's Law.

– Douglas Hofstadter, Gödel, Escher, Bach: An Eternal Golden Braid

#3
Momerath

Posted 15 February 2012 - 08:08 AM

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irancplusplus said:

hi
I think a decimal number is stored as a fixed point number (not a floating point number). that is, a decimal always has fixed number of digits after ".".
am I correct?

No. A decimal has a fixed number of digits (20). It doesn't matter where the decimal point is, you only get a total of 20 digits.

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