How do you write a function in Python?

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Khushi Singh · Answer

The Python language defines functions through the def keyword that introduces the function name and parameter parentheses together with a colon. Inside the body of the function there is a return statement to return a result while indentation represents the code structure. Functions serve as organizing elements for code while providing reusable functions that minimize duplicated code.

A basic numerical addition function is demonstrated as follows

def add_numbers(a, b):  
   return a + b  
result = add_numbers(5, 3)  
print(result)  # Output: 8

The function add_numbers accepts two parameters (a and b) to perform the calculation before returning the sum. The program invokes the function with parameters 5 and 3 while displaying the output.

Python functions allow default parameters together with variable argument syntax using args and kwargs, and they can also be lambda expressions (single-line anonymous functions). Applicable functions enable efficient modular organization of code, which enables multiple reuse of logic segments from different places in the program.

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How do you write a function in Python?

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