Python Function Arguments: Overview of Parameters and Arguments

First of all, let`s learn what positional, keyword, and optional arguments are.


python
9
1
2
3
def add(a, b, c):
    return a + b + c

The example above uses positional arguments. If you pass a different number of arguments, an error will occur. To call the function add(1, 2, 3), you just pass the arguments by their positions. The positional argument is a mandatory one.


python
9
1
2
add(b=2, c=3, a=1)

Also, you can pass arguments using names. And there are keyword arguments. In this case, you do not need to follow the order of the arguments.

def add(a, b, c = 0):

return a + b + c

print(add(1, 2))

print(add(1, 2, 3))


              1234
            
def add(a, b, c = 0):
    return a + b + c
print(add(1, 2))
print(add(1, 2, 3))

After giving a default value to the argument, it becomes an optional one. So, you may pass it, and if not, the function will use the default value.

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