const int SIZE = 10;
int v[SIZE];
int sum = 0;
for (int i = 0; i < SIZE; i++) {
v[i] = i * i;
sum += v[i];
}
cout << "Sum of the first " << SIZE << " squares = " << sum << endl;
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causes the array to look like:
and gives the output:
Sum of the first 10 squares = 285