8 - Signedness From Wikipedia the free encyclopedia Jump to navigationJump to search In computing signedness is a property of data types

8 - Signedness From Wikipedia the free encyclopedia...

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Signedness From Wikipedia, the free encyclopedia Jump to navigation Jump to search In computing, signedness is a property of data types representing numbers in computer programs. A numeric variable is signed if it can represent both positive and negative numbers, and unsigned if it can only represent non- negative numbers (zero or positive numbers). As signed numbers can represent negative numbers, they lose a range of positive numbers that can only be represented with unsigned numbers of the same size (in bits) because roughly half the possible values are non-positive values, whereas the respective unsigned type can dedicate all the possible values to the positive number range. For example, a two's complement signed 16-bit integer can hold the values −32768 to 32767 inclusively, while an unsigned 16 bit integer can hold the values 0 to 65535 . For this sign representation method, the leftmost bit ( most significant bit ) denotes whether the value is positive or negative (0 for positive, 1 for negative).

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