Home »
Python
Python Function Parameters
Last Updated : April 24, 2025
There are the following types of Python function parameters:
- Required parameters
- Default parameters
- Keyword/named parameters
- Variable length parameters
1. Python Required Parameters
If we define a function in python with parameters, so while calling that function – it is must send those parameters because they are Required parameters.
Example
# Required parameter
def show(id,name):
print("Your id is :",id,"and your name is :",name)
show(12,"deepak")
# show() #error
# show(12) #error
Output
Your id is : 12 and your name is : deepak
2. Python Default Parameters
If we define the parameters as default parameters, there will not any error occurred even you do not pass the parameter or pass the less parameters.
Example
# Default parameters
def show(id="<no id>",name="<no name>"):
print("Your id is :",id,"and your name is :",name)
show(12,"deepak")
show()
show(12)
Output
Your id is : 12 and your name is : deepak
Your id is : <no id> and your name is : <no name>
Your id is : 12 and your name is : <no name>
3. Python Keyword/Named Parameters
Python has dynamic types – so if we send parameters in the wrong sequence, it will accept the values due to dynamic typing. But, this data is not correct so to prevent this, we use keyword/named parameter.
Example
# keyword/named parameters
def show(id="<no id>",name="<no name>"):
print("Your id is :",id,"and your name is :",name)
# defualt/correct sequance
show(12,"deepak")
# sequence with the keywords
# there is no need to rememeber the parameters sequences
# provide the value with the name/argument name
show(name="priya",id=34)
Output
Your id is : 12 and your name is : deepak
Your id is : 34 and your name is : priya
4. Python Variable Length Parameters
By using *args, we can pass any number of arguments to the function in python.
Example
# Variable length parameters
def sum(*data):
s=0
for item in data:
s+=item
print("Sum :",s)
sum()
sum(12)
sum(12,4)
sum(12,4,6)
sum(1,2,3,4,5,6,7,8)
sum(12,45,67,78,90,56)
Output
Sum : 0
Sum : 12
Sum : 16
Sum : 22
Sum : 36
Sum : 348
Python Function Parameters Exercise
Select the correct option to complete each statement about function parameters in Python.
- The parameters that appear in the function definition are called ___.
- The values that are passed to the function when it is called are called ___.
- In Python, a function can have ___ parameters, which allow it to accept a variable number of arguments.
Advertisement
Advertisement