Question

I know you can write a statement like:

if (num1 != a && num1 != b && num1 != c ..........&& num1 != z)
   (do something);

But is there an easier way to compare the num1 variable to 26 other variables? Kinda like:

if (num1 != a,b,c,d,e,f,g.......)
   (do something);

Answer 1

If a..g are contiguous constant/enum values then just use a range check.

if (num >= a && num <= g)
{
    do_something();
}
else
{
    do_something_else();
}

If they are non-contiguous but constant then maybe use a switch statement.

switch (num)
{
    case a:
    case b:
    case c:
    case d:
    case e:
    case f:
    case g:
        do_something();
        break;

    default:
        do_something_else();
        break;
}

otherwise if they are just arbitrary variables or expressions then you may have just have to do it with multiple tests.