```
//Program to calculate the sum of n natural numbers using do while loop formula if you want sum = number * (1 + number)/2
#include<iostream>
using namespace std;
main()
{
int number, sum = 0, i= 1;
cout << "Enter the nth Number of Natural Number" << endl;
cin >> number;
do
{
sum = sum + i;
i++;
}
while(i <= number);
cout << "the sum upto "<< number << "th Natural Number is : " << sum;
return 0;
}
```

### Fix External Monitor Lag on Mac OS Ventura

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