python define global function
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in python, functions play a crucial role in structuring code and promoting reusability. understanding how to define global functions is essential for creating modular and maintainable code. in this tutorial, we'll explore the concept of global functions in python, along with code examples to illustrate their usage.
a global function in python is a function that is defined at the top level of a script or module and is accessible throughout the entire program. unlike local functions, which are confined to a specific scope (such as within another function), global functions can be called from any part of the code.
to define a global function, you simply write the def keyword followed by the function name and its parameters. the function body is indented and contains the code to be executed when the function is called.
in this example, we've defined a global function named greet that takes a name parameter and prints a greeting. the function can be called from anywhere in the code.
global functions can also return values using the return keyword. this allows the function to produce a result that can be used in other parts of the program.
here, the add_numbers function takes two parameters (x and y), calculates their sum, and returns the result. the returned value is then stored in the variable sum_result and printed.
global functions have a global scope, meaning they can access variables defined outside of the function. however, variables defined within the function are local to that function and cannot be accessed outside of it.
in this example, global_variable is accessible both within and outside the demonstrate_scope function, while local_variable is only accessible within the function.
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