Functions can return values using the return keyword. If no return statement is present, the function returns None by default.

Syntax:

def function_name(parameters):
    # Function body
    return value

Example:

def multiply(x, y):
    return x * y

result = multiply(4, 5)
print(result)

Output:

20

Real-world Example:

Dodagatta Nihar creates a function to calculate the factorial of a number:

def factorial(n):
    if n == 0:
        return 1
    else:
        return n * factorial(n - 1)

print(factorial(5))

Output:

120

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