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12. if Tests and Syntax Rules > Python Syntax Rules

Python Syntax Rules

I introduced Python’s syntax model in Chapter 10. Now that we’re stepping up to larger statements like the if, this section reviews and expands on the syntax ideas introduced earlier. In general, Python has a simple, statement-based syntax. However, there are a few properties you need to know about:

  • Statements execute one after another, until you say otherwise. Python normally runs statements in a file or nested block in order from first to last, but statements like if (and, as you’ll see, loops) cause the interpreter to jump around in your code. Because Python’s path through a program is called the control flow, statements such as if that affect it are often called control-flow statements.


  

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