Hello Sahithi

#include <iostream>

using namespace std;

int main()

{

    int n, i;

    float num[100], sum=0.0, average;

    cout << "Enter the numbers of data: ";

    cin >> n;

    while (n > 100 || n <= 0)

    {

        cout << "Error! number should in range of (1 to 100)." << endl;

        cout << "Enter the number again: ";

        cin >> n;

    }

    for(i = 0; i < n; ++i)

    {

        cout << i + 1 << ". Enter number: ";

        cin >> num[i];

        sum += num[i];

    }

    average = sum / n;

    cout << "Average = " << average;

    return 0;

}