What are lambda expressions in functional programming?

What are lambda expressions in functional programming?

Lambda expressions are anonymous functions that can be defined in a concise way. They are often used to create small, throwaway functions.

Can you give me an example of a lambda expression in Python?

Sure! In Python, a lambda expression can be defined like this: lambda x: x * 2. This creates a function that doubles its input.

How do lambda expressions differ from regular functions?

Lambda expressions are typically used for short, simple functions and do not require a name, while regular functions are defined using the def keyword and can be more complex.

When should I use lambda expressions?

You should use lambda expressions when you need a small function for a short period of time, especially as an argument to higher-order functions like map, filter, or reduce.