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| 1 bit can take 0 or 1 | |
| 1 Byte = 8 Bits | |
| The first bit is used as a sign ( - or + ) | |
| then remaining bits are 7 | |
| so we can write 2^7 = 128 different numbers for one sign | |
| we get 0 as a positive sign. then we have 128 numbers for the negative side,127 numbers for the positive side and 0 (zero) | |
| so the range is -128 to 127 including 0 | |
| -2(bits-1) and for the maximum range, it is 2(bits-1)-1 |