A Lambda Expression defines an anonymous function or a closure at the point where it is used. You can think of a lambda expression as an unnamed function (that’s why it’s called “anonymous”). Lambda expressions help make your C++ software code cleaner, more concise, and allow you to see behavior inline where it’s defined instead of referring to an external method, like a function.
Lambda Expressions are an expression that returns a function object. Lambda expressions are widely used in C++ as well as the C#, Groovy, Java, Python, Ruby languages too. Here is my latest post about advanced guide to lambda expressions :