Is def a built-in function in Python?

Is def a built-in function in Python?

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The def keyword in Python is used to define a new function, which is a block of code that can be executed multiple times from different parts of your program. A function can take arguments, perform some operation on those arguments, and return a value.

In other words, when you use the def keyword, you are essentially creating a named piece of code that can be reused throughout your program. This is one of the most powerful features of programming languages, as it allows you to break down complex tasks into smaller, more manageable pieces of code that can be easily reused.

Here's an example of how you might use the def keyword in Python:

def greet(name):
print("Hello, " + name + "!")
greet("John")  # Output: Hello, John!
greet("Jane")  # Output: Hello, Jane!

As you can see, the def keyword is used to define a function called greet, which takes one argument, name. The function then prints out a greeting message that includes the value of name.

One of the key benefits of using functions in Python (or any programming language) is that they allow you to avoid duplicating code. For example, if you wanted to print out greetings for multiple people, you wouldn't have to write a separate block of code for each person - instead, you could just call the greet function with different values for name, and Python would take care of the rest.

Functions are also a great way to organize your code into smaller, more manageable pieces. By breaking down a complex program into smaller functions, you can make it easier to understand and maintain - and even reuse those functions in other parts of your program or in future projects.

So, to answer your original question: yes, def is indeed a built-in function in Python! It's one of the most powerful and fundamental features of the language, and it allows you to create reusable pieces of code that can help you build more complex programs.

Parameters in Python example

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