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Round-by-chop: The base-expansion of is truncated after the ()-th digit. This rounding rule is biased because it always moves the result toward zero. Round-to-nearest: () is set to the nearest floating-point number to . When there is a tie, the floating-point number whose last stored digit is even (also, the last digit, in binary form, is equal ...
Huberto M. Sierra noted in his 1956 patent "Floating Decimal Point Arithmetic Control Means for Calculator": [1] Thus under some conditions, the major portion of the significant data digits may lie beyond the capacity of the registers. Therefore, the result obtained may have little meaning if not totally erroneous.
In some contexts it is desirable to round a given number x to a "neat" fraction – that is, the nearest fraction y = m/n whose numerator m and denominator n do not exceed a given maximum. This problem is fairly distinct from that of rounding a value to a fixed number of decimal or binary digits, or to a multiple of a given unit m.
In particular, there is only a very simple example, without rounding. This section is also probably off-topic: this is not an article about conversion, and conversion to decimal, using decimal arithmetic, is uncommon. Please help clarify the section. There might be a discussion about this on the talk page.
Number: suggested: Decimals: 3: Number of decimals to round to (zero or greater); if pad is not Yes, 0-digits will be cropped from the end. Default 0: Number: optional: Pad / actual number of digits: pad: If yes, use all digits given in Decimals. If a number, pad to that number of decimals. String: optional: Significant figures: sigfig
65520 and larger numbers round to infinity. This is for round-to-even; other rounding strategies will change this cut-off. ... or 1.0m has type System.Decimal) ...
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Excel maintains 15 figures in its numbers, but they are not always accurate; mathematically, the bottom line should be the same as the top line, in 'fp-math' the step '1 + 1/9000' leads to a rounding up as the first bit of the 14 bit tail '10111000110010' of the mantissa falling off the table when adding 1 is a '1', this up-rounding is not undone when subtracting the 1 again, since there is no ...
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