How to find the number of arguments in a Python function?
Last Updated :
16 Aug, 2021
In this article, we are going to see how to count the number of arguments of a function in Python. We will use the special syntax called *args that is used in the function definition of python. Syntax *args allow us to pass a variable number of arguments to a function. We will use len() function or method in *args in order to count the number of arguments of the function in python.
Example 1:
Python3
def no_of_argu( * args):
return ( len (args))
a = 1
b = 3
n = no_of_argu( 1 , 2 , 4 , a)
print ( " The number of arguments are: " , n)
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Output :
The number of arguments passed are: 4
Example 2:
Python3
def no_of_argu( * args):
return ( len (args))
print (no_of_argu( 2 , 5 , 4 ))
print (no_of_argu( 4 , 5 , 6 , 5 , 4 , 4 ))
print (no_of_argu( 3 , 2 , 32 , 4 , 4 , 52 , 1 ))
print (no_of_argu( 1 ))
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Output :
3
6
7
1
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