Why is the extra in these array codes?

Question

Here are the codes in the SoloLearn lesson:
static void Main(string[] args)
{
int[ ] a = new int[10];
for (int k = 0; k < 10; k++) {
a[k] = k*2;
}
foreach (int k in a) {
Console.WriteLine(k);
}
}
But what I don't get is why we need the "foreach" line when we can print the elements with the Console.WriteLine command within the same curly brackets as the for loop like this:
static void Main(string[] args)
{
int[ ] a = new int[10];
for (int k = 0; k < 10; k++) {
a[k] = k*2;
Console.WriteLine(k);
}
}
What's the point?

Answer 1

~ swim ~
Thanks for the reply but I need some clarification as I might've misunderstood something here:
So, what you say is "We don't need the foreach in the simple code above in the question, but in a complex (more crowded) code we need this 'foreach' so that it won't be confusing. The 'foreach' seems an extra here but in a complex one it won't be extra but utterly necessary."
Have I understood you well?
Sorry for the trouble again by the way.

Answer 2

~ swim ~
Ah I got it now. Thanks.
And yeah, I like foreach