Array!

Question

I still don’t get some part of array. So, the number in the array will be changed simultaneously if the number in for function was changed?
I mean like

int arr [] = {this numbers} are combined with for (x=0;x<this number;x++)?

But, how do we recognize them? Sorry for my explanation but it’ll be thankful if someone can answer this!

Answer 1

for loop is one of common ways to iterate array, but if you don't specifically put instructions that alters the array's elements nothing will happen with them, for example:

// Here we have an array with 5 elements
int ar[] = {1,2,3,4,5};
for(int i = 0; i < 5; i++)
{
// this will only print elements' value
cout << ar[i];
}

but if we go like this:

for(int i = 0; i < 5; i++)
{
// this will square elements' value
ar[i] *= ar[i];
}

Hth, cmiiw

Answer 2

I appreciate you guys!