How to use if, else & elif in Python Lambda Functions
Last Updated :
08 Aug, 2022
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.
Python3
result = lambda x : f"{x} is even" if x %2==0 else f"{x} is odd"
print(result(12))
print(result(11))
|
Output
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
Python3
result = lambda x,y : f"{x} is smaller than {y}" \
if x < y else (f"{x} is greater than {y}" if x > y \
else f"{x} is equal to {y}")
print(result(12, 11))
print(result(12, 12))
print(result(12, 13))
|
Output
12 is greater than 11
12 is equal to 12
12 is smaller than 13
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