How many different values can be stored in 4 bytes?

Four bytes can store (2^{32}) different values, since each byte consists of 8 bits and 4 bytes equal 32 bits. This means that the total number of unique combinations is (2^{32} = 4,294,967,296). This range includes values from 0 to (4,294,967,295) for unsigned integers, or from (-2,147,483,648) to (2,147,483,647) for signed integers.