Python lambda Keyword

By IncludeHelp Last updated : December 07, 2024

Description and Usage

The lambda is a keyword (case-sensitive) in python, it is used to create an anonymous function that can accept any number of arguments but a single expression/statement.

Syntax

Syntax of lambda keyword:

function_name = lambda parameters_list : expression

Sample Input/Output

Input:
# lambda function to find power
power = lambda x,y : x**y

# calling function
result = power(10, 3)
print(result)

Output:
1000

Example 1

Create a lambda function to find sum of 4 numbers.

# python code to demonstrate example of 
# lambda keyword

# Create a lambda function to find sum of 4 numbers

# lambda function to add 4 numbers
addnumbers = lambda n1,n2,n3,n4 : n1+n2+n3+n4

# numbers
a = 10
b = 20
c = 30
d = 40

# printing the sum by calling lambda function
print("sum = ", addnumbers(a,b,c,d))

Output

sum =  100

Example 2

Create a lambda function to find a to the power b, where, a and b are the parameters.

# python code to demonstrate example of 
# lambda keyword

# Create a lambda function to find a to the power b, 
# where a and b are the parameters

# lambda function to find power
power = lambda x,y : x**y

a = 10  # base
b = 3   # power

# calling function
result = power(a,b)

# printing the result
print("power of ", a, " and ", b, " is = ", result)

Output

power of  10  and  3  is =  1000

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