Hexadecimal (hex) is number system to the base 16. In hexadecimal the decimal numbers 0–15 are represented by the symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E and F. Hexadecimal numbers are easy to convert to the computer's internal binary code and are more compact than binary numbers. One hexadecimal digit stands in place of four binary bits (4-bits).

In Pascal a hexadecimal literal is indicated by using a $prefix. # Conversion Table Hexadecimal Decimal Binary$0000     0     %0000000000000000
$0001 1 %0000000000000001$0002     2     %0000000000000010
$0003 3 %0000000000000011$0004     4     %0000000000000100
$0005 5 %0000000000000101$0006     6     %0000000000000110
$0007 7 %0000000000000111$0008     8     %0000000000001000
$0009 9 %0000000000001001$000a     10     %0000000000001010
$000b 11 %0000000000001011$000c     12     %0000000000001100
$000d 13 %0000000000001101$000e     14     %0000000000001110
$000f 15 %0000000000001111$0010     16     %0000000000010000
$0011 17 %0000000000010001$0012     18     %0000000000010010
$0013 19 %0000000000010011$0014     20     %0000000000010100
...     ...     ...
$009f 159 %0000000010011111$00a0     160     %0000000010100000
...     ...     ...
$00ff 255 %0000000011111111$0100     256     %0000000100000000
\$0101     257     %0000000100000001