What is a Lambda in Python?

One of the most asked Python Interview Question

Python Tip

A Lambda Function is also known as Anonymous Function in Python. It has no name, but it can accept arguments and returns a value like a function.

Lambda functions are useful for creating quick, one-time use functions.

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Lambda functions are defined using the keyword "lambda", followed by the function parameters, separated by commas, followed by single line expression.

Lambda function returns a the value of the expression in its body.

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A sample Lambda function to check if a number is even or not.

A sample lambda function to check if a number is even or not.

We can assign a lambda function to variable and invoke that using the variable.

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Lambda functions can be used with the built-in higher order functions like filter() and map() to create functional programming constructs. We ca pass lambda function as a callback function in other higher order functions function.

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We can filter only even numbers from List using filter() function and Lambda Function.

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Lambda functions are Anonymous Functions and mostly used to create small one time use functions in Python. You can also use if-else within a Lambda Function in Python.

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