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How values can I have if I have 4 bytes?
I'm not sure what you mean. How many possible numbers can you represent with four bytes? 1 byte = 8 bits 4 bytes = 32 bits. A bit has 2 possibilities: on or off, 1 or 0, etc. So 2^32 will give us the number of possibilities we can represent. 2^32 = 4294967296 We can represent numbers 0 to 4294967295