rounding off numbers - translation to german
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rounding off numbers - translation to german

DIFFERENCE BETWEEN THE RESULT PRODUCED BY AN ALGORITHM WHEN USING EXACT ARITHMETIC AND WHEN USING FINITE-PRECISION, ROUNDED ARITHMETIC
Rounding error; Roundoff error; Round-off; Round off; Rounding errors; Round-off errors

rounding off numbers      
Zahlen abrunden (Zahlen auf ganze oder rundere Zahlen abrunden)
rounding error         
Abrundungsfehler (Fehler bei der Berechnung von abgerundeten Zahlen)
round off         
abrunden (Zahl, Betrag)

Definition

Rounding
·adj Round or nearly round; becoming round; roundish.
II. Rounding ·p.pr. & ·vb.n. of Round.
III. Rounding ·noun Small rope, or strands of rope, or spun yarn, wound round a rope to keep it from chafing;
- called also service.
IV. Rounding ·noun Modifying a speech sound by contraction of the lip opening; labializing; labialization. ·see Guide to Pronunciation, / 11.

Wikipedia

Round-off error

In computing, a roundoff error, also called rounding error, is the difference between the result produced by a given algorithm using exact arithmetic and the result produced by the same algorithm using finite-precision, rounded arithmetic. Rounding errors are due to inexactness in the representation of real numbers and the arithmetic operations done with them. This is a form of quantization error. When using approximation equations or algorithms, especially when using finitely many digits to represent real numbers (which in theory have infinitely many digits), one of the goals of numerical analysis is to estimate computation errors. Computation errors, also called numerical errors, include both truncation errors and roundoff errors.

When a sequence of calculations with an input involving any roundoff error are made, errors may accumulate, sometimes dominating the calculation. In ill-conditioned problems, significant error may accumulate.

In short, there are two major facets of roundoff errors involved in numerical calculations:

  1. The ability of computers to represent both magnitude and precision of numbers is inherently limited.
  2. Certain numerical manipulations are highly sensitive to roundoff errors. This can result from both mathematical considerations as well as from the way in which computers perform arithmetic operations.