---
title: "How to Find Sum of Series in Python"
description: "Sample Python script to calculate the sum of the GP series. Knowing the skills applied to write this script useful for interviews."
url: https://srinimf.com/2021/11/22/how-to-find-sum-of-series-in-python/
date: 2021-11-22
modified: 2026-10-10
author: "Srini"
image: https://i0.wp.com/srinimf.com/wp-content/uploads/2021/11/series-sum-script-new.png?fit=1200%2C675&ssl=1
categories: ["Python"]
type: post
lang: en
---

# How to Find Sum of Series in Python

Here’s a Python program that calculates the sum of geometric progression series. For instance, 1+11+111+111 and so on. For loop and Range function, you can use to write a script for this.

*Python series sum*

## Geometric progression

This script will work for the GP series for any numeric number. The generalized input is n+nn+nnn+nnnn+ and so on.

### Python knowledge applies

- The range function decides how man terms sends to for loop
- The for loop process the terms till all the numbers of range function
- The print function displays total all the numbers present in this series.

### Python script to calculate series sum

![Python script to calculate series sum](https://i0.wp.com/srinimf.com/wp-content/uploads/2021/11/python-script.png?resize=548%2C324&ssl=1)

### Output

You can see the sum of all the terms in the output. In our case, I have hard-coded the number of terms as ‘5’. You can further improve this by asking for user input from the terminal. You need to use, for this, the input() function.

![Result of Python script that calculates series sum](https://i0.wp.com/srinimf.com/wp-content/uploads/2021/11/result-series-script.png?resize=607%2C414&ssl=1)

Here, first, you can see displays for all the series terms. Secondly, you can see the total of all the terms. It is a tricky python question. Must know [how to](https://srinimf.com/2023/06/05/how-to-print-sum-of-prime-numbers-in-python/) write this logic before your interviews.

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