What's the difference if we used lambda or polynomial?

Question

Output will be same in both cases then what is the main use of function lambda.

Answer 1

The use of lambda function is that we can define a function and call it in a single line.

For example:

def square(n):
return n**2
print(square(5))

print((lambda x : x**2) (5))

Here the two functions does the same thing. But lambda function makes it simple....

Answer 2

The lambda function is a single use non addressed function. This kind of function is used in the Functional Paradigm to create a complicated function that unique to an instance and will not be used again. This saves space and improves execution in Interpreted Languages, like Haskell, BCPL and Python.
Remember : Python is not a pure Object Oriented Language, it is Multi-Paradigm Language.