A byte is the smallest unit of data on a system. An unsigned byte can old the values One character with different possible values. The premise of this question is completely wrong.
A byte is not defined as 8 bits, that is an octet. A byte is the smallest addressable data size in the architecture. Add a comment. Active Oldest Votes. Improve this answer. Venkatesh K Venkatesh K 3, 4 4 gold badges 17 17 silver badges 24 24 bronze badges. While an 8-bit byte holds exactly one 8-bit character, if you are working with a subset of characters they can be encoded into less than 8 bits. For instance, as one example, if you only wanted to store uppercase letters A-Z, you could store up to 9 of them in one byte.
This in practice is really rare, and generally one requires more than just A-Z and even if one doesn't at time of implementation, one will in the future.
Space is cheap these days and so we generally don't stoop to this sort of encoding which is frankly nasty in terms of how fiddly it can get to code with. Rod Lloyd Rod Lloyd 61 1 1 silver badge 1 1 bronze badge. A page of a book with 50 characters per line, 50 lines per page takes 2, bytes, so a page book takes 1,, bytes. As with metres and kilometres, we need some new units, or we'd need a lot of zeroes! Hence we write that a page is approximately 2. Python Javascript Linux Cheat sheet Contact.
How many characters can you store with 1 byte? Tags: Mysql Character Byte. The sign bit which is bit 15 indicates whether the number is positive or negative. A logic 1 indicates negative, a logic 0 indicates positive. To store larger integer values would require more bits. Some systems and languages also support the use of unsigned integers, which are deemed to be positive only. An efficient way of storing fractions is called the floating point method, which involves splitting the fraction into two parts, an exponent and a mantissa.
The computer industry agreed upon a standard for the storage of floating point numbers. It is called the IEEE standard, and uses 32 bits of memory for single precision , or 64 bits for double precision accuracy.
The single precision format looks like,. NOTE: Keep dividing by 2 till a fraction between 0 and 1 results. The fraction is the mantissa value, the number of divisions is the exponent value. The exponent bit pattern is stored using an excess of This means that this value is added to the exponent when storing and subtracted when removing. The mantissa is a little more complicated to work out. Each bit represents 2 to the power of a negative number.
It looks like,.
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