Section 8.6 - the entire first section was hard to understand

**What Course are you in**
cpp4python

**What Page were you on**
section 8.6

**What is your username**
maalims

**Describe the bug**
The first section(before the first quiz) is hard to understand. Maybe employing a better explanation technique for better understanding a reader might help.

**Traceback**
The first section of section 8.6, before the first quiz


