A calculation is a deliberate process that transforms one or more inputs into one or more results. The term is used in a variety of senses, from the very definite arithmetical calculation of using an algorithm, to the vague heuristics of calculating a strategy in a competition, or calculating the chance of a successful relationship between two people. For example, multiplication, multiplying 7 by 6 is a simple algorithmic calculation. Estimating the fair price for financial instruments using the Black–Scholes model is a more complex algorithmic calculation. Statistical estimations of the likely election results from opinion polls also involve algorithmic calculations, but produces ranges of possibilities rather than exact answers. To ''calculate'' means to determine mathematically in the case of a number or amount, or in the case of an abstract problem to deduce the answer using logic, reason or common sense. The English word derives from the Latin ''calculus'', which originally meant a small stone in the gall-bladder (from Latin ''calx''). It also meant a pebble used for calculating, or a small stone used as a counter in an abacus (Latin ''abacus'', Greek language, Greek ''abax''). The abacus was an instrument used by Greeks and Romans for arithmetic calculations, preceding the slide-rule and the electronic calculator, and consisted of perforated pebbles sliding on iron bars.

Comparison to computation

Calculation is a prerequisite for computation. The difference in the meaning of ''calculation'' and ''computation'' appears to originate from the late medieval period.Jrank.org

See also

* Calculus (disambiguation) — list of general methods of calculation by application area * Complexity class — theoretical notion to categorize calculability * Cost accounting — business application of calculation * List of algorithms — fully formalized, computer-executable methods of calculation * Mental calculation — performing arithmetics using one's brain only


External links

"The Lifting of the Veil in the Operations of Calculation"
is a manuscript, from the 18th-century, in Arabic, by Ibn al-Banna' al-Marrakushi, about calculation processes {{Authority control Elementary arithmetic