Which statement best describes a lambda expression?

Which statement best describes a lambda expression?

• A. An anonymous method that can be passed as data
• B. A named function
• C. A data structure
• D. An exception type

Answer: (A)

Lambdas are anonymous functions defined inline, designed to be used as values that can be passed around like data. This lets you provide small pieces of behavior to other code without naming them, such as giving a function to filter a list, map over items, or respond to an event. Because they’re unnamed, they’re often a concise way to express a specific operation right where you need it, and they can be stored in variables, returned from other functions, or passed as arguments to other functions. This concept differs from a named function, which has a specific identifier you call, and from data structures, which hold data rather than executable behavior. It also isn’t an exception type, which represents error conditions. In practice, you might see a lambda like x => x * 2 (or similar syntax in different languages) passed to a function that processes each element, illustrating how a function value can be treated as data.

Lambdas are anonymous functions defined inline, designed to be used as values that can be passed around like data. This lets you provide small pieces of behavior to other code without naming them, such as giving a function to filter a list, map over items, or respond to an event. Because they’re unnamed, they’re often a concise way to express a specific operation right where you need it, and they can be stored in variables, returned from other functions, or passed as arguments to other functions.

This concept differs from a named function, which has a specific identifier you call, and from data structures, which hold data rather than executable behavior. It also isn’t an exception type, which represents error conditions. In practice, you might see a lambda like x => x * 2 (or similar syntax in different languages) passed to a function that processes each element, illustrating how a function value can be treated as data.