32-bit computing: Difference between revisions

Revision as of 00:00, 3 December 2023

Revision as of 00:00, 3 December 2023

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==Range for storing integers==

A 32-bit register can store 2³² different values. The [[range (computer programming)|range]] of [[integer]] values that can be stored in 32 bits depends on the [[Integer (computer science)#Value and representation|integer representation]] used. With the two most common representations, the range is 0 through [[4,294,967,295]] (2³² − 1) for representation as an ([[signedness|unsigned]]) [[binary number]], and −2,147,483,64648 (−2³¹) through [[2,147,483,647]] (2³¹ − 1) for representation as [[two's complement]].

One important consequence is that a processor with 32-bit [[memory address]]es can directly access at most 4 [[Gibibyte|GiB]] of [[Byte addressing|byte-addressable]] memory (though in practice the limit may be lower).