Integer overflow: Difference between revisions

Revision as of 01:09, 25 April 2007

Revision as of 00:45, 5 May 2007

Line 10:

: 32 bits (the most common width for personal computers [[as of 2005]], maximum representable value 4,294,967,295),

: 64 bits (maximum representable value 18,446,744,073,709,551,615),

: 128 bits (maximum representable value approx. 102³⁸¹²⁸ - 1)

Since an arithmetic operation may produce a result larger than the maximum representable value, a potential error condition may result. In the [[C (programming language)|C programming language]], for example, signed integer overflow causes [[undefined behavior]], although arithmetic on unsigned integers, however, is reduced [[modular arithmetic|modulo a power of two]], meaning that unsigned integers "wrap around" on overflow.