Introduction to Programming

What is a lambda expression?

The term lambda comes from lambda calculus—a universal model of computation that can be used to simulate any Turing machine. It was introduced by mathematician, Alonzo Church, in the 1930s. A lambda expression is a function, implemented in Java as an anonymous method, that also allows us to omit modifiers, return types, and parameter types. That makes for a very compact notation.

The syntax of a lambda expression includes the list of parameters, an arrow token ->, and a body. The list of parameters can be empty (), without brackets (if there is only one parameter), or a comma-separated list of parameters surrounded by brackets. The body can be a single expression or a statement block. 

Let us look at a few examples: ...