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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