In Python, functions are blocks of reusable code that perform a specific task. They help in organizing and modularizing code by breaking it into smaller, manageable pieces. Functions take inputs (arguments) and can return outputs (return values). Here’s a basic syntax for defining and using functions in Python:
Using a Function: Once a function is defined, you can call it by using its name followed by parentheses, optionally passing any required arguments. Here’s an example:
In this example, we define a function called square that takes an argument x and returns its square. We then call the function with the argument 5 and store the returned value in the variable result. Finally, we print the value of result, which is 25.
Functions can also have multiple arguments, default values for arguments, variable-length arguments, and keyword arguments. Additionally, Python provides many built-in functions, and you can create your own custom functions to suit your specific needs.