In 2 complements I read from wikipedia, the range is from -128 to 127. So I wonder how do we represent 128 in 2 complement as it is out of range above?
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In 2 complements I read from wikipedia, the range is from -128 to 127. So I wonder how do we represent 128 in 2 complement as it is out of range above?
You use more bits.
The range -128 to +127 is 256 unique values, which is 8 bits. If you need a larger range, you need more bits.
There is nothing restricting 2s-complement numbers to 8-bit values. For instance, a 16-bit 2s-complement number ranges from -32768 to +32767.