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initialize whole array to 0 c++

int nScores[100] = {0};
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c++ initialize array 1 to n

std::vector<int> arr(SIZE);
for (int i = 0; i < SIZE; i++)
{
    arr[i] = i;
}
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initialize dynamic array c++ to 0

int *arrayName = new int[10]{0}; 
//Print array elements
for(int i=0; i<10; i++ { cout<<arrayName[i] <<" "; }
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