Computer represent numbers by using only 2 digits numbers, 0 and 1, or known as binary digit. 8-bit or 1 byte number can represent numbers from 0 through 255. But it can also represent negative numbers from -128 through 127.

Here’s the 8-bit number:

  • Unsigned 8-bit numbers : 0 through 255
  • Signed 8-bit numbers : -128 through 127

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