7F in Decimal
Hexadecimal 7F equals 127 in decimal.
Why this number matters: 127 is the largest positive value of a signed 8-bit integer (int8) and the loopback IP octet (127.0.0.1).
7F in all number bases
Decimal127
Hexadecimal0x7F
Binary0111 1111
Octal177
How 7f converts from hexadecimal to decimal
Multiply each digit by 16 raised to its position (starting at 0 from the right), then add the results:
7× 161 = 7 × 16 = 112
F× 160 = 15 × 1 = 15
Sum: 127