Python Lambda Function without Arguments

Lambda Function without Arguments in Python

In Python, you can define a lambda function without any arguments by using an empty parameter list.

For example, consider the following lambda function.

lamda: "Hello World"

This lambda function has no arguments, and when you call this lambda function, it always returns "Hello World".

Therefore, a lambda function without arguments returns a specified constant value.

Examples

1. Lambda Function without arguments that always returns "Hello World"

In the following program, we define a lambda function without any arguments, and that always returns a string value of "Hello World". We shall assign the lambda function to a variable named greeting. Call the lambda function with greeting() and print the returned value.

Python Program

greeting = lambda: "Hello World"

# Call the lambda function
result = greeting()
print(result)

Output

Hello World

2. Lambda Function without arguments that always returns 3.14

In the following program, we define a lambda function without any arguments, and that always returns a floating point value of 3.14.

We shall assign the lambda function to a variable named pi.

Python Program

pi = lambda: 3.14

# Call the lambda function
result = pi()
print(f"PI is {result}")

Output

PI is 3.14

Summary

In this tutorial of Python Lambda Functions, we learned how to define a lambda function without arguments, and does this lambda function work, with the help of example programs.