**The Program in C++ to Find the Sum of GP series is given below**:

```
#include <iostream>
#include <cmath>
using namespace std;
int main() {
double a, r, n;
double sum = 0;
cout << "Hello Codeauri Family, enter the first term of the series here: \n";
cin >>a;
cout << "Similarly,enter the common ratio here:\n";
cin >>r;
cout<< "and enter the number of terms here:\n";
cin >>n;
for (int i = 0; i < n; i++) {
sum += a * pow(r, i);
}
cout << "Well,the sum of the GP series is: " << sum << endl;
return 0;
}
```

## Output:

Hello Codeauri Family, enter the first term of the series here:

5

Similarly,enter the common ratio here:

6

and enter the number of terms here:

7

Well,the sum of the GP series is: 279935

## Pro-Tips**💡**

This program prompts the user to enter the first term (a), common ratio (r), and number of terms (n) of a geometric progression (GP) series.

It then uses a for loop to calculate the sum of the series by adding up each term,

which is calculated using the formula: a * r^i, where i is the current term number (0-indexed).

Finally, it prints the sum of the series.

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