About the meaning of 0x7fffffff

Can you calculate the 0x7fffffff?
Each hexadecimal number is 4bit, so 8-bit 16 is 4 bytes, just an int integer


The binary code for F is 1111
7 Binary code is 0111


As a result, the whole integer 0x7fffffff's binary representation is that except the first is 0, the rest is 1.
That is, this is the largest integer int (because the first digit is the sign bit, 0 indicates that he is a positive number)

You can override this value with the Int_max constant.

~0: Represents the minimum value.

~0U represents unsigned reshaping 0

~0 >> 1: Maximum value