十六進制
以16為基底之進位制 / 維基百科,自由的 encyclopedia
十六進制(英語:Hexadecimal,簡寫為Hex或下標16)在數學中是一種逢16進1的進位制。一般用數碼0到9和字母A到F表示,其中:A~F相當於十進位的10~15,這些稱作十六進制數碼。
例如十進制數57,在二進制寫作111001,在16進制寫作39。
現在的16進制則普遍應用在電腦領域,這是因為將4個位元(Bit)化成單獨的16進制數字不太困難。1個位元組(Byte)可以表示成2個連續的16進制數字。可是,這種混合表示法容易令人混淆,因此需要一些字首、字尾或下標來顯示。
0hex | = | 0dec | = | 0oct | 0 | 0 | 0 | 0 | |||
1hex | = | 1dec | = | 1oct | 0 | 0 | 0 | 1 | |||
2hex | = | 2dec | = | 2oct | 0 | 0 | 1 | 0 | |||
3hex | = | 3dec | = | 3oct | 0 | 0 | 1 | 1 | |||
4hex | = | 4dec | = | 4oct | 0 | 1 | 0 | 0 | |||
5hex | = | 5dec | = | 5oct | 0 | 1 | 0 | 1 | |||
6hex | = | 6dec | = | 6oct | 0 | 1 | 1 | 0 | |||
7hex | = | 7dec | = | 7oct | 0 | 1 | 1 | 1 | |||
8hex | = | 8dec | = | 10oct | 1 | 0 | 0 | 0 | |||
9hex | = | 9dec | = | 11oct | 1 | 0 | 0 | 1 | |||
Ahex | = | 10dec | = | 12oct | 1 | 0 | 1 | 0 | |||
Bhex | = | 11dec | = | 13oct | 1 | 0 | 1 | 1 | |||
Chex | = | 12dec | = | 14oct | 1 | 1 | 0 | 0 | |||
Dhex | = | 13dec | = | 15oct | 1 | 1 | 0 | 1 | |||
Ehex | = | 14dec | = | 16oct | 1 | 1 | 1 | 0 | |||
Fhex | = | 15dec | = | 17oct | 1 | 1 | 1 | 1 | |||