How to use if, else & elif in Python Lambda Functions

Lambda function can have multiple parameters but have only one expression. This one expression is evaluated and returned. Thus, We can use lambda functions as a function object. In this article, we will learn how to use if, else & elif in Lambda Functions.

Using if-else in lambda function

The lambda function will return a value for every validated input. Here, if block will be returned when the condition is true, and else block will be returned when the condition is false. 

Syntax:

lambda <arguments> : <statement1> if <condition> else <statement2>

Here, the lambda function will return statement1 when if the condition is true and return statement2 when if the condition is false.

Example:

Here, We are going to find whether a number is even or odd. when we pass number 12 to lambda function it will execute statement 1 and statement2 for 11. 

12 is even
11 is odd

Using if else & elif in lambda function

We can also use nested if, if-else in lambda function. Here we will create a lambda function to check if two number is equal or greater or lesser. We will implement this using the lambda function.

Syntax:

lambda <args> : <statement1> if <condition > ( <statement2> if <condition> else <statement3>)

Here, statement1 will be returned when if the condition is true, statement2 will be returned when elif true, and statement3 will be returned when else is executed. 

Example:

Here, we passed 2 numbers to the lambda function. and check the relation between them. That is if one number is greater or equal or lesser than another number

12 is greater than 11
12 is equal to 12
12 is smaller than 13