# Control Flow

To understand everything that 61A is trying to teach you, it's important to understand the fundamental idea that everything is based on — **how are Python programs executed?**

Let's start by talking about control flow. The flow of control is the order in which statements are executed by a programming language. For the purposes of this class, let's establish a core assumption: **only one line of Python code can be executed at any given time.**

With this assumption in mind, let us analyze the different ways in which we can mess around with the flow of control in Python.


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