What is the meaning of this "for" line? What output should i expect?

Question

#include<iostream>
Using namespace std;
int main()
{
int arr[5] = {10, 0, 20, 0, 30};
For(int i : arr)
{
cout<< arr[i] <<"\n";
}
}

Answer 1

Using : in a for loop just goes through all the items in the array. But since the items are there, it will output garbage values. To get the items correctly, use:
for(int i : arr) {
cout << i << endl;
}

Just a small note: For should be for and Using should be using.

Answer 2

Ha... Thanks.. and for the note I typed in my phone!! Autocorrect dictionary! :D