Summation Write a program that finds the summation of every number from 1 to num. The number will always be a positive integer greater than 0.

> 原文:[https://www . geeksforgeeks . org/python-矩阵中第 k 列求和/](https://www.geeksforgeeks.org/python-summation-of-kth-column-in-a-matrix/) 有时 ...