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I've been reading a few sites, but none of them make sense to me. Is signed and unsigned binary them same as signed and unsigned variables. I'd be glad if you could help :)
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The biggest difference between a signed and unsigned binary number is that the far left bit is used to denote whether or not the number has a negative sign. The rest of the bits are then used to denote the value normally.
Unsigned binary numbers are, by definition, positive numbers and thus do not require an arithmetic sign. An m-bit unsigned number represents all numbers in the range 0 to 2m − 1. For example, the range of 8-bit unsigned binary numbers is from 0 to 25510 in decimal and from 00 to FF16 in hexadecimal.
The "signed" indicator means that the item can hold positive or negative values. "Unsigned" doesn't distinguish between positive and negative values. A signed/unsigned variable can refer to any numerical data type (such as binary, integer, float, etc). Each data type might be further defined as signed or unsigned.
For example, an 8-bit signed binary could hold values from 0-127, both positive and negative (1 bit is used for the sign and 7 bits for the value), while an 8-bit unsigned binary could hold values from 0-255 (nothing distinguishes whether or not the value should be considered positive or negative, though it is commonly assumed to be positive).
A signed binary is a specific data type of a signed variable.
Hope that helps!
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