In Python, a function is a reusable block of code that performs a specific task or set of tasks. Functions are a fundamental concept in programming and serve several purposes. They allow you to encapsulate a sequence of statements into a single named entity, making code more organized, readable, and maintainable. When you call a function in Python, you are essentially instructing the program to execute the code contained within that function.
To call a function in Python, you use its name followed by parentheses, typically with optional arguments enclosed within the parentheses. For example, if you have defined a function named "calculate_sum" that adds two numbers, you can call it by writing "calculate_sum(5, 3)", where "5" and "3" are the arguments passed to the function. The function will execute its code, perform the addition, and potentially return a result. Apart from it by obtaining Python Online Certification Course, you can advance your career in Python. With this course, you can demonstrate your expertise as an as Sequences and File Operations, Conditional statements, Functions, Loops, OOPs, Modules and Handling Exceptions, various libraries such as NumPy, Pandas, Matplotlib, many more.
Functions can also be called without arguments if they don't require any input. Additionally, functions can return values using the "return" statement, which allows you to retrieve the result of a function call and use it in your program.
The concept of functions in Python promotes code modularity and reusability, as you can define a function once and use it multiple times throughout your program. Python provides a wide range of built-in functions, and you can create your own custom functions to suit your specific programming needs. Functions are a cornerstone of structured programming and play a crucial role in making Python a versatile and expressive programming language.