Lambda Function In Python

Lambda operator or lambda function is used for creating small, one-time and anonymous function objects in Python.

They are called anonymous functions as there is no formal definition given in the code as we give for formal functions. That is there is no def keyword used while defining Lambda functions.

Basic Syntax:

lambda arguments : expression

lambda operator can have any number of arguments, but it can have only one expression. It cannot contain any statements and it returns a function object which can be assigned to any variable.

For Example:

Normal function definition of a function that adds two number:

def add(x, y): 
    return x + y
  
print(add(2, 3))   

Output:

5

Function name is add, it expects two arguments x and y and returns their sum.

Using Lambda Function to do tha same:

add = lambda x,y : x+y  #returns function object to add
print(add(2,3))

Output:

5

Summary: 

Lambda function basic syntax

lambda arguments : expression