# Python lambda functions

Lambda function are small one line function. Lambda function are also referred to as anonymous function as they don’t have function name associated with them.

Syntax of lambda function:

``lambda  arguments : expression``

A lambda function can have any number of arguments but only one expression. This expression is often equivalent to return value in normal function.

### Comparing lambda function with normal function

Let’s see a normal function

``````def add(x,y):
return x+y
``````

An equivalent lambda function for above function would be:

``lambda x, y: x + y``

### Why use lambda function?

Lambda function are simple one line function which can return an expression based on the parameters. This makes it powerful to do computation , when we use it inside a function it can take additional parameter for calibration.

Example : Lambda function inside a return statement

``````def add_3_coordinates(x_cord):
y_coord = 2
return lambda z_coord: x_cord + y_coord + z_coord

final_result = result(6)
print("old sum =",final_result)

# we can simply do

Output

``````old sum = 13
new sum= 13
``````

Example

``````add_coord = lambda x_coord, y_coord : x_coord + y_coord

Output:

``````add_coord(3,4)= 7
``````

Lambda function could be combined with  and  and  or  statement to get more complex statement.

Example 3: Lambda function to find odd or even number

``````odd_even = lambda x: (x % 2 and 'Yes' or 'No')

print("odd_even(4)=",odd_even(4))
print("odd_even(5)=",odd_even(5))``````

Output:

``````odd_even(4)= No
odd_even(5)= Yes``````