What are Lambda Expressions?

What are lambda expressions?

In programming, a lambda expression, also called a lambda function, literal function, or anonymous function; is a defined subroutine that is not bound to an identifier.

Lambda expressions are typically used for the following:

- As arguments that are passed to other higher order functions. ​
- To construct the result of a higher order function you need to return a function.

If the lambda function is only used once or a limited number of times, a lambda expression may be syntactically simpler than a named function. Lambda functions are very common in functional programming and other languages ​​with first-class functions, where they serve the same role for the function type as literals for other data types.

If we focus on the field of application programming, with the addition of lambda expressions we can create more concise and meaningful programming codes, in addition to opening the door to functional programming in Java, where lambda functions play a fundamental role.

Through the powerful combination of Lambdas and Stream, Java is making a paradigm shift in its coding so far.

Through lambda expressions we can reference anonymous methods or unnamed methods, which allows us to write clearer and more concise code than when using anonymous classes.