Hexadecimal

Hexadecimal code is another number system used by computers. While decimal (our normal number system) uses ten digits, and binary uses two digits (0 and 1), hexadecimal uses base 16.

Instead of using only 0's and 1's like binary, or 0-9 like decimal, hexadecimal uses 0-9 just like base 10, but also A-F. A=10, B=11, and so forth. The most convenient method of converting binary to hexadecimal is to first separate the binary number into string of 4 digits. Then, convert each group into base 10, at which point 10-15 are changed into letters.

Ex.

     10010111
   1001   0110
2^3+2^0   2^2+2^1+2^0
8+1        4+2+1
  9          7
       97