# Chapter 4 B2U2 Loops and Iterations

This is a suplementary material for the corresponding lesson from Python for Everybody.

## 4.1 Exercises on Loops

Caution: the

**third video**is a spoiler ;-) I explain there the task but also write a program to solve it. Please make your own**solution**first. If you get stuck, please watch only as much as required to continue with your own solution. In the video the following steps are provided:- explanation of the technical part of the task
- an initial solution for positive numbers
- an extended solution to get values for negative values of arguments
- a final solution to get correct values for all values of arguments

**20S198801 U07 D00 loops programming tasks**

duration: 06:32

**20S198801 U07 D01 loops multiplication explaimed**

duration: 03:45

**20S198801 U07 D02 loops multiplication solution**

duration: 05:47

**20S198801 U07 D03 loop perfect numbers explained**

duration: 07:57

**20W198801 U07 D04 loops atm**

duration: 08:42

total duration: 32:43

Exercises:

- the material is provided in OLAT