What is a lambda expression?

What is a lambda expression?

• A. An anonymous method that can be passed as data (argument, variable, return value)
• B. A named function
• C. A static initializer
• D. A data structure

Answer: (A)

Lambda expressions are anonymous functions that can be treated as values. They let you define a function inline and pass it around as data—such as as an argument to another function, assign it to a variable, or return it from a method. This makes it easy to express short operations without creating a separate named method, enabling concise, higher-order programming. They aren’t named functions, so they’re not just ordinary helper methods. They aren’t static initializers, which run to set up static fields. They aren’t data structures like lists or maps.

Lambda expressions are anonymous functions that can be treated as values. They let you define a function inline and pass it around as data—such as as an argument to another function, assign it to a variable, or return it from a method. This makes it easy to express short operations without creating a separate named method, enabling concise, higher-order programming.

They aren’t named functions, so they’re not just ordinary helper methods. They aren’t static initializers, which run to set up static fields. They aren’t data structures like lists or maps.