For example, the byte type 5 is 00000101 in the memory. After bitwise inversion, it is 11111010

When you output this number again, it becomes 250

Bitwise inversion means 1 changes to 0, and 0 changes to 1

First of all, you need to know that most of the computers we use now are 32-bit machines, so integers are all 4 bytes

Then look at the result of bitwise negation:

00000000 00000000 00000000 00000101 This is 5

00000000 00000000 00000000 00000000 This is 0

11111111 11111111 11111111 11111111 This is -1

11111111 11111111 11111111 11111110 This is -2

11111111 11111111 11111111 11111101 This is -3

11111111 11111111 11111111 11111100 This is -4

11111111 11111111 11111111 11111011 This is -5

11111111 11111111 11111111 11111010 This is the result of the negation of 5 -6

Do you understand?