Size of a byte is 1 byte
1 byte=8 bits
first bit represent signed value
1)0 means +sign
2)1 means -sign
Remaining 7 bits represent value either 0 or 1.
Max value for a byte is +127
Min value for a byte is -128
The range of byte is -128 to +127
The most significant bit(MSB) acts as signed bit.
Positive numbers directly in memory.
Negative numbers in 2’s complement form.

Except boolean and char remaining data types considered as signed datatypes because we can represent both positive and negative numbers.

bytediagram

types