||                      Logical OR Operator

 exp1 || exp2            Logical OR
 exp1, exp2              any integral expression

    The || operator performs a logical OR on exp1 and exp2; the resulting
    value is 1 (TRUE) if either exp1 or exp2 or both are TRUE, and 0
    (FALSE) otherwise.  The operator evaluates exp1 first; if exp1 is a
    non-zero value (TRUE), then exp2 is not evaluated, since the entire
    expression is already true.  Example:

           if ((i == j) || (myfunc(k) == 0))
               ...              /* if i == j, myfunc() isn't called */