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PYTHON EMCEE HOW TO

Remove ads Grouping Statements: Indentation and Blocksīut let’s say you want to evaluate a condition and then do more than one thing if it is true:

PYTHON EMCEE HOW TO

Lastly, you’ll tie it all together and learn how to write complex decision-making code.

Next, using the if statement as a model, you’ll see why control structures require some mechanism for grouping statements together into compound statements or blocks.

First, you’ll get a quick overview of the if statement in its simplest form.

The outline of this tutorial is as follows: It allows for conditional execution of a statement or group of statements based on the value of an expression. In a Python program, the if statement is how you perform this sort of decision-making. (It’s implied that if the weather isn’t nice, then I won’t mow the lawn.) If the weather is nice, then I’ll mow the lawn. In the real world, we commonly must evaluate information around us and then choose one course of action or another based on what we observe: Here’s what you’ll learn in this tutorial: You’ll encounter your first Python control structure, the if statement. A control structure directs the order of execution of the statements in a program (referred to as the program’s control flow). That is where control structures come in.

Frequently, a program needs to skip over some statements, execute a series of statements repetitively, or choose between alternate sets of statements to execute. Everything you have seen so far has consisted of sequential execution, in which statements are always performed one after the next, in exactly the order specified.īut the world is often more complicated than that. Watch it together with the written tutorial to deepen your understanding: Conditional Statements in Python (if/elif/else)įrom the previous tutorials in this series, you now have quite a bit of Python code under your belt. Watch Now This tutorial has a related video course created by the Real Python team.