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What is Function?

Feb 26, 2024

What is Function?

In computer science, a function is a block of organized, reusable code that is used to perform a single, related action. Functions provide better modularity for your application and a high degree of code reusing.

As you are a freshman or sophomore in college, you might be familiar with functions in mathematics where you pass an input and you get an output. In programming, functions work in a similar way: you can pass data, known as parameters, into a function, and the function can return data as a result.

Here is an example of a simple function in Python:

python

When you call "greet("Lulu")", the function will return the string "Hello, Lulu!".

Importance of Functions

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Modularity: Break down complex processes into manageable pieces

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Reusability: Write the code once and use it many times

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Organization: Make the code more organized and easier to understand

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Maintainability: Easier to maintain and update the code

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Abstraction: Hide the complex implementation details and expose only the necessary parts