Creating a Lambda Expression in C++

A basic lambda expression can look something like this:

auto greet = []() {
  // lambda function body
};

Here,

• [] is called the lambda introducer which denotes the start of the lambda expression
• () is called the parameter list which is similar to the () operator of a normal function

The above code is equivalent to:

void greet() {
  // function body
}

Now, just like the normal functions, we can simply invoke the lambda expression using:

greet();

Note: We have used the auto keyword to automatically deduce the return type for lambda expression.