Function parameters allow you to pass data into a function so it can perform operations using that data.
They make functions flexible and reusable.<\/p>\n\n\n\n
Parameters are variables listed inside the parentheses when defining a function.<\/p>\n\n\n\n
Arguments are the actual values passed when calling the function.<\/p>\n\n\n\n
def greet(name): # name is a parameter
print(\"Hello\", name)greet(\"Hira\") # \"Hira\" is an argument<\/pre>\n\n\n\nTYPES OF FUNCTION PARAMETERS<\/strong><\/h1>\n\n\n\n
Python supports different types of parameters.<\/p>\n\n\n\n
1. POSITIONAL PARAMETERS<\/strong><\/h1>\n\n\n\n
These are the most common type.
Values are assigned based on their position.<\/p>\n\n\n\ndef add(a, b):
return a + bprint(add(5, 3))<\/pre>\n\n\n\nHere, 5 is assigned to
a<\/code> and 3 tob<\/code>.<\/p>\n\n\n\n2. KEYWORD PARAMETERS<\/strong><\/h1>\n\n\n\n
You can specify arguments by parameter name.<\/p>\n\n\n\n
def student(name, age):
print(\"Name:\", name)
print(\"Age:\", age)student(age=20, name=\"Ali\")<\/pre>\n\n\n\nOrder does not matter when using keyword arguments.<\/p>\n\n\n\n
3. DEFAULT PARAMETERS<\/strong><\/h1>\n\n\n\n
You can assign default values to parameters.<\/p>\n\n\n\n
def greet(name=\"Guest\"):
print(\"Hello\", name)greet()
greet(\"Sara\")<\/pre>\n\n\n\nIf no argument is provided, the default value is used.<\/p>\n\n\n\n
4. VARIABLE-LENGTH PARAMETERS<\/strong><\/h1>\n\n\n\n
Sometimes you don\u2019t know how many arguments will be passed.<\/p>\n\n\n\n
*args (Non-Keyword Arguments)<\/h2>\n\n\n\n
def add_numbers(*numbers):
total = 0
for num in numbers:
total += num
return totalprint(add_numbers(1, 2, 3, 4))<\/pre>\n\n\n\n
*args<\/code> collects multiple positional arguments into a tuple.<\/p>\n\n\n\n**kwargs (Keyword Arguments)<\/h2>\n\n\n\n
def display_info(**info):
for key, value in info.items():
print(key, \":\", value)display_info(name=\"Hira\", age=25)<\/pre>\n\n\n\n
**kwargs<\/code> collects multiple keyword arguments into a dictionary.<\/p>\n\n\n\nIMPORTANT RULES<\/strong><\/h1>\n\n\n\n
\u2022 Positional arguments must come before keyword arguments
\u2022 Default parameters must come after required parameters
\u2022 *args comes before **kwargs in function definition<\/p>\n\n\n\nExample order:<\/p>\n\n\n\n
def example(a, b=10, *args, **kwargs):
pass<\/pre>\n\n\n\nWHY PARAMETERS ARE IMPORTANT<\/strong><\/h1>\n\n\n\n
\u2022 Make functions reusable
\u2022 Allow dynamic input
\u2022 Help build flexible applications
\u2022 Reduce code duplication<\/p>\n\n\n\nUnderstanding function parameters helps you write powerful and professional Python programs.<\/p>\n\n\n