|                        Bitwise OR operator

 exp1 | exp2             Bitwise OR
 exp1, exp2              any integral expression

    The | operator performs a bit-by-bit OR operation on exp1 and exp2.  (A
    bit of the result is true  if either or both of the  corresponding bits
    of exp1 or exp2 is true.)  Example:

           i = 4080;            # i == 0x0FF0 == 0000111111110000 (base 2)
           j = 65280;           # j == 0xFF00 == 1111111100000000 (base 2)
           k = i | k;           # k == 0xFFF0 == 1111111111110000 (base 2)