Python 2 7 6 tutorial episode 3 functions

sure! in python 2.7.6, functions are defined using the `def` keyword followed by the function name and parentheses containing optional parameters. the `return` statement is used to exit a function and return a value back to the caller.

here is a step-by-step tutorial on defining functions with a `return` statement in python 2.7.6:

1. **defining a function**:
to define a function, use the `def` keyword followed by the function name and parentheses containing any parameters the function takes. here is an example of a simple function that adds two numbers:

2. **using the return statement**:
within the function, use the `return` statement followed by the value you want to return. the function will exit and return this value to the caller. here's how you can call the `add_numbers` function and store the result in a variable:

3. **returning multiple values**:
you can return multiple values from a function by separating them with commas. here's an example:

4. **returning none**:
if a function does not have a `return` statement or the `return` statement does not contain a value, the function will return `none`. here's an example:

5. **returning early**:
you can use the `return` statement to exit a function early based on a condition. here's an example:

remember that in python 2.7.6, the `return` statement is used to return values from functions. make sure to use it appropriately based on the logic of your function.

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