What is a function argument in python w3schools

Quentina 70 Published: 08/24/2024

What is a function argument in python w3schools

I'll respond in English as requested.

In Python, a function argument, also known as a parameter, is a value passed to a function when it's called. This value is used within the function to perform specific tasks or operations. A function can have multiple arguments, which are denoted by the variable names specified in the function definition.

Let's take an example of a simple Python function that takes two arguments:

def greet(name, message):

print(f"Hello, {name}! {message}")

In this function, name and message are the two arguments. When we call this function, we need to provide values for these arguments:

greet("John", "Have a nice day!")

The output would be: Hello, John! Have a nice day!

Here's how it works:

Positional arguments: When you define a function with multiple arguments, you can pass values to them in the order they're defined. For example: 
def sum(a, b):

return a + b


result = sum(3, 4)


print(result)  # Output: 7

In this case, a and b are positional arguments.

Keyword arguments: Alternatively, you can pass values to function arguments using keyword-value pairs: 
def person(name, age):

print(f"Name: {name}, Age: {age}")


person(name="John", age=30)

In this example, we're passing name and age as separate values.

Default arguments: You can also specify default values for function arguments: 
def person(name, age=18):

print(f"Name: {name}, Age: {age}")


person("John")  # Output: Name: John, Age: 18


person("Jane", age=25)  # Output: Name: Jane, Age: 25

In this case, age has a default value of 18. If we don't provide an age value when calling the function, it will use the default.

Variable-length arguments: Using the *args syntax, you can create functions that accept variable-length argument lists: 
def sum_numbers(*numbers):

total = 0


for num in numbers:


total += num


return total


result = sum_numbers(1, 2, 3, 4, 5)


print(result)  # Output: 15

In this example, sum_numbers takes a variable number of arguments, which are stored in the numbers tuple.

In conclusion, Python function arguments provide flexibility when working with functions. By understanding how to work with different types of arguments (positional, keyword, default, and variable-length), you can create more robust and versatile code that adapts to various situations.

Argument in Python example

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