Do something for every hundredth element in an array

Question

I have 1 million elements in an array, I need to divide these elements into groups of 100, do a function and continue working on the next hundred

foreach (string value in lines)
{
    filescreated++;
    if (filescreated == ?????????)
    {
        do stuff 
    }
}

???? is equal to value divisible by 100

Answer 1

is equal to value divisable by 100

foreach (...)
{
    filescreated++;

    if (filescreated % 100 == 0) 
    {
        // do stuff for the every 100th element
    }

    // do other stuff for every element
}

Reference: modulus (%) operator

Use this if you need to do something special for every 100th element, but you still need to process every element.

If you only need to process every 100th element, refer to Reed's answer.