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certainly! functions in python are a fundamental building block of the language that allow you to encapsulate reusable pieces of code. they help in organizing your code, improving readability, and enabling code reuse. let's go through an informative tutorial on functions in python, complete with code examples.

what is a function?

a function is a block of code that performs a specific task. it can take inputs (known as parameters), execute a set of instructions, and then return an output.

defining a function

you define a function using the `def` keyword, followed by the function name and parentheses. here's the basic syntax:



example 1: a simple function

let's create a simple function that adds two numbers:



parameters and arguments

functions can accept parameters which are the values you pass into the function. the terms "parameters" and "arguments" are often used interchangeably, but they refer to slightly different concepts:

**parameters**: the variables listed in the function definition.
**arguments**: the actual values you pass when calling the function.

example 2: function with default parameters

you can also define default values for parameters. if no argument is provided, the default value is used.



example 3: function with multiple parameters

you can define a function with multiple parameters. here’s an example that calculates the area of a rectangle:



returning multiple values

functions can return multiple values as a tuple. here’s an example:



scope of variables

variables defined inside a function are local to that function and cannot be accessed from outside. for example:



lambda functions

python also supports anonymous functions, known as lambda functions. they are defined using the `lambda` keyword and can take any number of arguments but only have one expression.



conclusion

functions are a powerful feature of python that help you structure your code in a clean and efficient manner ...

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